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3 Carat Ruby No Heat

GRS Certified 3 Carat Purplish Red NO HEAT Ruby Diamond Ring
GRS Certified 3 Carat Purplish Red NO HEAT Ruby Diamond Ring

GRS Certified 3 Carat Purplish Red NO HEAT Ruby Diamond Ring

By Antinori Fine Jewels

Located in Chicago, IL

GRS Certified 3 Carat No-Heat Purplish Red Ruby Ring Lively.

Category

2010s Unknown Contemporary Solitaire Rings

Materials

Diamond, White Diamond, Ruby

AGL Certified 2.19 Carat No Heat Burma Ruby & Trapezoid Diamond 3 Stone Ring
AGL Certified 2.19 Carat No Heat Burma Ruby & Trapezoid Diamond 3 Stone Ring

AGL Certified 2.19 Carat No Heat Burma Ruby & Trapezoid Diamond 3 Stone Ring

Located in Miami, FL

AGL Certified 2.19 carat no heat Burma ruby ring. Adorned with 2 trapezoid cut diamonds totaling 0.97 cttw. The gemstones are set in prong setting; ruby is set in 18k yellow gold and...

Category

21st Century and Contemporary Burmese Contemporary Three-Stone Rings

Materials

Diamond, Ruby, Gold, 18k Gold, White Gold, Yellow Gold

Natural Siam Ruby (Thailand) 0.68ct  No-Heat
Natural Siam Ruby (Thailand) 0.68ct  No-Heat

Natural Siam Ruby (Thailand) 0.68ct No-Heat

Located in Nicosia, Cyprus

Details • Gemstone: Natural Ruby • Cut: oval • Weight: 0.68 ct • Origin: Siam (thailand) • Treatment: No treatement / no-heat • Dimensions: 5.6 x 4.2 x 3 • Certificate: Not in...

Category

20th Century Art Deco Loose Gemstones

Materials

Ruby

3.07 Carat Natural Mozambique Ruby Diamond Platinum Ring NO HEAT
3.07 Carat Natural Mozambique Ruby Diamond Platinum Ring NO HEAT

3.07 Carat Natural Mozambique Ruby Diamond Platinum Ring NO HEAT

Located in Chicago, IL

Mozambique has become one of the most important sources for fine rubies in the modern era, and unheated examples over 3 carats with strong color saturation are particularly sought af...

Category

2010s American Solitaire Rings

Materials

Diamond, White Diamond, Ruby, Platinum

11.24 Carat Burma No Heat Ruby Sugar Loaf & Half Moon Cut Diamond 3 Stone Ring
11.24 Carat Burma No Heat Ruby Sugar Loaf & Half Moon Cut Diamond 3 Stone Ring

11.24 Carat Burma No Heat Ruby Sugar Loaf & Half Moon Cut Diamond 3 Stone Ring

Located in Tampa, FL

11.24 Carat Burma No Heat Ruby Sugar Loaf & Half Moon Cut Diamond 3 Stone Ring Featuring a rare and large 11.24 carat sugar loaf ruby with gorgeous vivid red color certified by the ...

Category

2010s Burmese Three-Stone Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold, Platinum

9.49 Carat No Heat Burmese Ruby Diamond Gold Earrings
9.49 Carat No Heat Burmese Ruby Diamond Gold Earrings

9.49 Carat No Heat Burmese Ruby Diamond Gold Earrings

Located in Beverly Hills, CA

Classy earrings featuring two oval rubies - 4.89-ct and 4.60-ct. The rubies come with a GIA Ruby Origin Report stating that the rubies are not heated and are of Burmese origin. The r...

Category

Mid-20th Century Unknown Modern More Earrings

Materials

Ruby, White Diamond, 14k Gold, 18k Gold, White Gold, Yellow Gold

Pigeon's Blood No Heat Ruby Diamond White Gold Ring
Pigeon's Blood No Heat Ruby Diamond White Gold Ring

Pigeon's Blood No Heat Ruby Diamond White Gold Ring

Located in San Francisco, CA

This gorgeous 18k white gold ring features a vivid-intense color no heat pear-shaped ruby weighing 1.02 carats, framed by round brilliant and rose-cut pear-shaped diamonds, together ...

Category

21st Century and Contemporary Unknown Cocktail Rings

Materials

Ruby, 18k Gold, White Gold

Ruby & Diamond Ring Burma No Heat GIA
Ruby & Diamond Ring Burma No Heat GIA

Ruby & Diamond Ring Burma No Heat GIA

Located in Litchfield, CT

This gorgeous three-stone ring features a 1.32 carat no-heat Burma ruby (GIA lab report) and two .50 carat fine white French cut diamonds (G color, VS clarity).

Category

Vintage 1970s American Three-Stone Rings

Materials

Diamond, Ruby, Platinum

Vintage18k White Gold No Heat Ruby & Diamond Ring (9.0+CT Ruby)
Vintage18k White Gold No Heat Ruby & Diamond Ring (9.0+CT Ruby)

Vintage18k White Gold No Heat Ruby & Diamond Ring (9.0+CT Ruby)

Located in Lexington, KY

This beautiful ring is like no other! It features a traditional 3 stone design with three large, oval cabachon, natural corundum rubies in a gorgeous talon setting. Surrounding the 3...

Category

20th Century Three-Stone Rings

Materials

Diamond, Ruby, Gold, 18k Gold, White Gold

18.90 Carats NO-HEAT Ruby Mozambique Round Cut Stone For Jewelry Natural Gem
18.90 Carats NO-HEAT Ruby Mozambique Round Cut Stone For Jewelry Natural Gem

18.90 Carats NO-HEAT Ruby Mozambique Round Cut Stone For Jewelry Natural Gem

Located in Jaipur, RJ

18.90 Carats NO-HEAT Ruby Mozambique Round Cut Stone For Jewelry Natural Gem Weight: 18.90 Carats Size: 1.5 to 3 mm Quantity - 363 Pieces Shape: round cut stone

Category

21st Century and Contemporary Mozambican Art Deco Loose Gemstones

Materials

Ruby

No Heat 3 Carat Oval Cut Ruby and Diamond Halo Stud Earrings in 18K White Gold
No Heat 3 Carat Oval Cut Ruby and Diamond Halo Stud Earrings in 18K White Gold

No Heat 3 Carat Oval Cut Ruby and Diamond Halo Stud Earrings in 18K White Gold

By Gad & Co.

Located in Miami, FL

No heat, untreated oval cut pair of Rubies set in a round cut diamond halo. Mounted in 18-karat white gold with butterfly push-back posts. These Rubies bear excellent color and luste...

Category

2010s Art Deco Stud Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

2.60 Carats Mozambique Ruby Top Quality Princess Cut stone No Heat Natural Gem
2.60 Carats Mozambique Ruby Top Quality Princess Cut stone No Heat Natural Gem

2.60 Carats Mozambique Ruby Top Quality Princess Cut stone No Heat Natural Gem

Located in Jaipur, RJ

2.60 Carats Mozambique Ruby Top Quality Princess Cut stone No Heat Natural Gem Weight: 2.60 Carats Size: 2 to 3 MM Pieces: 17 piece Shape: Princess cut stone

Category

21st Century and Contemporary Mozambican Art Deco Loose Gemstones

Materials

Ruby

Antique Ruby and Diamond Ring No Heat Burma
Antique Ruby and Diamond Ring No Heat Burma

Antique Ruby and Diamond Ring No Heat Burma

Located in Litchfield, CT

Circa 1890s, 14k, American. This stunning ruby and diamond ring features a spectacular .76 carat No Heat Burma Ruby surrounded by 1.0 carats of superb white diamonds (H color, VS cla...

Category

Antique 1890s American Fashion Rings

Materials

Diamond, Ruby, 14k Gold

AGL Certified 3.04 Carat Pigeon’s Blood No-Heat Ruby with Diamond Halo Ring
AGL Certified 3.04 Carat Pigeon’s Blood No-Heat Ruby with Diamond Halo Ring

AGL Certified 3.04 Carat Pigeon’s Blood No-Heat Ruby with Diamond Halo Ring

Located in Miami, FL

AGL Certified 3.04 Carat No Heat “Pigeons Blood” Oval Ruby with Cathedral Diamond Halo Ring Setting.

Category

21st Century and Contemporary Afghan Modern Cocktail Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

AGL Certified 10.88 Carat No Heat Burma Star Ruby in Vintage Platinum Ring
AGL Certified 10.88 Carat No Heat Burma Star Ruby in Vintage Platinum Ring

AGL Certified 10.88 Carat No Heat Burma Star Ruby in Vintage Platinum Ring

Located in Miami, FL

AGL Certified 10.88 Carat Natural Burma Origin Star Ruby in Platinum and Baguette Diamond 3 Stone Ring.

Category

Vintage 1950s Art Deco Cocktail Rings

Materials

Diamond, Ruby, Star Ruby, Platinum

GIA Certified No Heat Burma Carved Ruby Diamond 4.69 Carat Rose Gold Ring
GIA Certified No Heat Burma Carved Ruby Diamond 4.69 Carat Rose Gold Ring

GIA Certified No Heat Burma Carved Ruby Diamond 4.69 Carat Rose Gold Ring

By OGI Ltd

Located in New York, NY

Introducing our exquisite GIA Certified No Heat Burma Carved Ruby, weighing 4.34 carat and Diamond weighing 0.35 Carat 14 Karat Rose Gold Ring – a masterpiece of timeless elegance an...

Category

2010s American Contemporary Cocktail Rings

Materials

Diamond, Ruby, Gold, 14k Gold, Rose Gold

Edwardian 3.47 CTW No Heat Burma Ruby Diamond Platinum Antique Fanning Halo Ring
Edwardian 3.47 CTW No Heat Burma Ruby Diamond Platinum Antique Fanning Halo Ring

Edwardian 3.47 CTW No Heat Burma Ruby Diamond Platinum Antique Fanning Halo Ring

Located in Philadelphia, PA

Centering a round cut ruby weighing 1.97 carats total - transparent medium purplish red Natural Burmese (Myanmar) in origin and displaying no indications of heat treatment Prong set ...

Category

Vintage 1910s Edwardian Engagement Rings

Materials

Diamond, Ruby, Platinum

Certified 9 Carat No Heat Pinkish Red Ruby & Fancy Cognac Diamond Cocktail Ring
Certified 9 Carat No Heat Pinkish Red Ruby & Fancy Cognac Diamond Cocktail Ring

Certified 9 Carat No Heat Pinkish Red Ruby & Fancy Cognac Diamond Cocktail Ring

Located in Hong Kong, HK

Please check out the HD video! Big statement piece. Here is a nice oversized pinkish red Ruby and diamond ring. The ring is set in 18k white gold and fancy cognac colored and white d...

Category

2010s Hong Kong Contemporary Cocktail Rings

Materials

Diamond, White Diamond, Ruby, Gold, 18k Gold, White Gold

15.64 Carat Burma Ruby No Heat And Diamond Bracelet In 18 Karat White Gold
15.64 Carat Burma Ruby No Heat And Diamond Bracelet In 18 Karat White Gold

15.64 Carat Burma Ruby No Heat And Diamond Bracelet In 18 Karat White Gold

By Rewa Jewellery

Located in Bangkok, TH

An elegant Burmese ruby and diamond bracelet showcased by Rewa jewels is handcrafted in 18 karat white gold. It has 15 pieces of a Burmese Rubies, square shaped weighing 15.64 car...

Category

2010s Thai Aesthetic Movement Clamper Bracelets

Materials

Diamond, Ruby, 18k Gold, White Gold

Mid-Century 3.00 Carat No-Heat Ruby Diamond 18k White Gold Ring, GIA Certified
Mid-Century 3.00 Carat No-Heat Ruby Diamond 18k White Gold Ring, GIA Certified

Mid-Century 3.00 Carat No-Heat Ruby Diamond 18k White Gold Ring, GIA Certified

Located in Beverly Hills, CA

A captivating ruby, weighing approximately 3 carats, commands attention in this exquisite ring. The ruby, expertly cut in a cushion shape, displays a rich and intense red hue that is...

Category

20th Century American Art Deco Fashion Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

Exceptionally Fine No-Heat Ruby Diamond Platinum Ring, GIA Certified
Exceptionally Fine No-Heat Ruby Diamond Platinum Ring, GIA Certified

Exceptionally Fine No-Heat Ruby Diamond Platinum Ring, GIA Certified

Located in Beverly Hills, CA

A superb gem weighing a substantial 3.20 carat, this ruby has the ideal color, clarity, brilliance and is completely natural with no treatments certified by the GIA. It has a rich an...

Category

21st Century and Contemporary American Cocktail Rings

Materials

Diamond, Ruby, Platinum

Vintage Large Pendant 40Ct Natural Ruby No Heat & Black & White Diamond 18KWG
Vintage Large Pendant 40Ct Natural Ruby No Heat & Black & White Diamond 18KWG

Vintage Large Pendant 40Ct Natural Ruby No Heat & Black & White Diamond 18KWG

Located in New York, NY

Vintage Large Pendant 40Ct Natural Ruby No Heat & Black & White Diamond 18KWG This Large eye catching Pendant Necklace with is crafted from 18 Karat gold and features large Pear-shap...

Category

2010s Drop Necklaces

Materials

Diamond, White Diamond, Ruby, 18k Gold

Rare GIA Certified 7.91 No Heat Afghanistan Ruby 18K Pave Diamond Ring
Rare GIA Certified 7.91 No Heat Afghanistan Ruby 18K Pave Diamond Ring

Rare GIA Certified 7.91 No Heat Afghanistan Ruby 18K Pave Diamond Ring

Located in Los Angeles, CA

Stones- 1 Cushion Cabochon No Heat Afghanistan Ruby 7.91 ,64 Round Diamonds F-G Color VS1-VS2 Clarity 2.25 Carats.

Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Yellow Gold Ruby Solitaire Bypass Ring - 18k Oval 1.98ct GIA No Heat
Yellow Gold Ruby Solitaire Bypass Ring - 18k Oval 1.98ct GIA No Heat

Yellow Gold Ruby Solitaire Bypass Ring - 18k Oval 1.98ct GIA No Heat

Located in Greensboro, NC

Size: 6 1/4 Sizing Fee: Up 2 sizes for $80 or Down 1 size for $60 Metal Content: 18k Yellow Gold Stone Information Natural Ruby Treatment: Not Enhanced Carat(s): 1.98ct Cut: Oval ...

Category

21st Century and Contemporary Cocktail Rings

Materials

Ruby, 18k Gold, Yellow Gold

1940s French Set of Diamond and Burma No Heat Ruby Necklace and Earrings
1940s French Set of Diamond and Burma No Heat Ruby Necklace and Earrings

1940s French Set of Diamond and Burma No Heat Ruby Necklace and Earrings

Located in New York, NY

1940's French Diamond and Ruby Necklace and Earrings Set The necklace has approximately 75ct of rubies and 40-42ct of diamonds all set in Platinum, and the clasps are white gold. The...

Category

Mid-20th Century French Art Nouveau Drop Necklaces

Materials

Diamond, Ruby, Platinum

AGL Certified 3 Carat No Heated Oval Ruby 18K White And Yellow Gold Ring
AGL Certified 3 Carat No Heated Oval Ruby 18K White And Yellow Gold Ring

AGL Certified 3 Carat No Heated Oval Ruby 18K White And Yellow Gold Ring

By Antinori Fine Jewels

Located in Chicago, IL

Embrace the luxurious allure of the Antinori Di Sanpietro 3 Carat Ruby Ring, an exquisite piece of artistry designed to captivate and enchant.

Category

2010s Unknown Contemporary Engagement Rings

Materials

Diamond, White Diamond, Ruby, 18k Gold, White Gold, Yellow Gold

GIA 1.55ct Natural No-Heat Orange Red Spinel and Diamond 3-Stone Vintage Ring
GIA 1.55ct Natural No-Heat Orange Red Spinel and Diamond 3-Stone Vintage Ring

GIA 1.55ct Natural No-Heat Orange Red Spinel and Diamond 3-Stone Vintage Ring

Located in New York, NY

Red SPINEL, the gem of the many royals - a Very Sparkly Alternative for the Modern Engagement ring. If you are one of the many people interested in something other than a colorless d...

Category

Vintage 1950s Engagement Rings

Materials

Diamond, Spinel, 18k Gold, White Gold

Circa 1950s Platinum 3-Stone Engagement Ring with New 5 Carat Ruby + Baguettes
Circa 1950s Platinum 3-Stone Engagement Ring with New 5 Carat Ruby + Baguettes

Circa 1950s Platinum 3-Stone Engagement Ring with New 5 Carat Ruby + Baguettes

Located in Sherman Oaks, CA

This is a traditional three stone engagement ring for a large emerald-cut diamond. We decided to change it from an engagement ring to a RING ring. A luxe pop of color that looks ...

Category

Mid-20th Century American Contemporary Solitaire Rings

Materials

Ruby, White Diamond, Diamond, Platinum

GIA Certified .3 Carat  Natural Red Ruby Diamond Gold Victorian Engagement Ring
GIA Certified .3 Carat  Natural Red Ruby Diamond Gold Victorian Engagement Ring

GIA Certified .3 Carat Natural Red Ruby Diamond Gold Victorian Engagement Ring

Located in Stamford, CT

Rare and beautiful late 1800’s 18k yellow gold engagement ring with top gem natural rubies- GIA certified natural and no heat. Two nice old mine cut diamonds. Handmade Victorian ring...

Category

Antique 1890s Engagement Rings

Materials

Diamond, Ruby, Gold, 18k Gold, Yellow Gold

3 Carat Oval Treated Ruby & 1.25 ct Diamond Ring 14 Karat White Gold Size 6
3 Carat Oval Treated Ruby & 1.25 ct Diamond Ring 14 Karat White Gold Size 6

3 Carat Oval Treated Ruby & 1.25 ct Diamond Ring 14 Karat White Gold Size 6

Located in New York, NY

Introducing a truly stunning piece, behold the 3 Carat Oval Treated Ruby & 1.25 ct Diamond Ring in exquisite 14 Karat White Gold.

Category

2010s Cocktail Rings

Materials

Diamond, Ruby, 14k Gold, White Gold

Vintage 1.34ct Squared Ruby 3 Channel Row Sterling Silver Wide Split Shank Ring
Vintage 1.34ct Squared Ruby 3 Channel Row Sterling Silver Wide Split Shank Ring

Vintage 1.34ct Squared Ruby 3 Channel Row Sterling Silver Wide Split Shank Ring

Located in เกาะสมุย, TH

Vintage sterling silver wide‑band ring set with 1.34 carats of square‑cut rubies in a bold three‑row channel design. The sculptural split‑shank silhouette gives the piece lift and mo...

Category

21st Century and Contemporary Thai Contemporary Cocktail Rings

Materials

Quartz, Ruby, Sterling Silver

3.02 Carat Burma Ruby Diamond and 18 Karat Gold Dome Ring
3.02 Carat Burma Ruby Diamond and 18 Karat Gold Dome Ring

3.02 Carat Burma Ruby Diamond and 18 Karat Gold Dome Ring

Located in New York, NY

Rubies from Burma over 3 carats are extremely rare and an important object in any collector's portfolio.

Category

1990s Dome Rings

Materials

Diamond, Ruby, 18k Gold

Peter Suchy GIA 1.51 Carat Oval Natural Ruby Diamond Platinum Engagement Ring
Peter Suchy GIA 1.51 Carat Oval Natural Ruby Diamond Platinum Engagement Ring

Peter Suchy GIA 1.51 Carat Oval Natural Ruby Diamond Platinum Engagement Ring

By Peter Suchy

Located in Stamford, CT

Three stone platinum engagement ring. GIA certified 1.51cts Oval natural no heat ruby center stone in a handmade platinum basket setting with two half moon accent diamonds. Created i...

Category

21st Century and Contemporary American Three-Stone Rings

Materials

Diamond, Ruby, Platinum

J.E. Caldwell & Co. 2.52 Carat Cushion Cut Ruby Diamond Platinum Cocktail Ring
J.E. Caldwell & Co. 2.52 Carat Cushion Cut Ruby Diamond Platinum Cocktail Ring

J.E. Caldwell & Co. 2.52 Carat Cushion Cut Ruby Diamond Platinum Cocktail Ring

By J.E. Caldwell & Co.

Located in Miami, FL

✔ Metal: Platinum ✔ Ruby Weight: 2.52 carats ✔ Ruby Origin: Siam (Thailand) ✔ Ruby Cut: Oval (modified cut) ✔ Ruby Cut: Purplish red ✔ Enhancements/treatments: None; no heat, ...

Category

20th Century American Retro Cocktail Rings

Materials

Diamond, White Diamond, Ruby, Platinum

Non Heated 1.03 Carat Thai Ruby and Diamond Cluster Ring in Yellow Gold
Non Heated 1.03 Carat Thai Ruby and Diamond Cluster Ring in Yellow Gold

Non Heated 1.03 Carat Thai Ruby and Diamond Cluster Ring in Yellow Gold

Located in Jesmond, Newcastle Upon Tyne

Ruby Quality Origin Thailand (Siam) Cut Cushion Content 1.03 carats Dimensions 6.70mm x 5.00mm x 3.20mm Diamond Quality Color (average grades) H Clarity (average grades) SI2 Cut Eig...

Category

Vintage 1930s Unknown Cluster Rings

Materials

Diamond, Ruby, Gold, 18k Gold, Yellow Gold, Platinum

Boucheron Ruby Bracelet Diamond Gold Platinum Burmese Ruby GIA, French
Boucheron Ruby Bracelet Diamond Gold Platinum Burmese Ruby GIA, French

Boucheron Ruby Bracelet Diamond Gold Platinum Burmese Ruby GIA, French

By Boucheron

Located in Beverly Hills, CA

The gemstones are reported by GIA as ruby no heat and Burma origin (see more details in the GIA Report).

Category

Vintage 1980s French Bangles

Materials

Diamond, Ruby, 18k Gold, Yellow Gold, Gold, Platinum

18K White Gold 3.30ctw Ruby & 0.30ct Brilliant Diamond Ballerina Ring
18K White Gold 3.30ctw Ruby & 0.30ct Brilliant Diamond Ballerina Ring

18K White Gold 3.30ctw Ruby & 0.30ct Brilliant Diamond Ballerina Ring

Located in เกาะสมุย, TH

Product Details: Metal: 18k Solid Gold Metal Color: White Gold Ruby: Natural, purplish-red, oval cut and tapered baguette cut, heat-treatment, 3.30 total carats, Oval cut dimension:...

Category

21st Century and Contemporary Thai Contemporary Cocktail Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

18K Gold Statement Ring with Natural Opal Ruby and Diamond, featuring Pear
18K Gold Statement Ring with Natural Opal Ruby and Diamond, featuring Pear

18K Gold Statement Ring with Natural Opal Ruby and Diamond, featuring Pear

Located in Jupiter, FL

Setting Style: Prong/Pave Setting Material: 18K Yellow Gold Setting Weight: 12.5 Grams Main Stone: Opal Shape: Pear Weight: N/A Clarity: Translucent Color: Red, Green, Orange Play o...

Category

2010s Modern Engagement Rings

Materials

Diamond, Opal, Ruby, 18k Gold

18K White Gold 2.40ct Squared Ruby & 0.21ct Diamond Invisible Band Ring
18K White Gold 2.40ct Squared Ruby & 0.21ct Diamond Invisible Band Ring

18K White Gold 2.40ct Squared Ruby & 0.21ct Diamond Invisible Band Ring

Located in เกาะสมุย, TH

Product Details: Metal: 18k Solid Gold Metal Color: White Gold Ruby: Natural, pinkish-red, squared cut, heat-treatment, 2.40 carats Diamonds: Natural, brilliant & baguette cut, VS1,...

Category

21st Century and Contemporary Thai Art Deco Engagement Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

18K White Gold 2.40ct Squared Purplish Ruby & 0.10ct Diamond Invisible Band Ring
18K White Gold 2.40ct Squared Purplish Ruby & 0.10ct Diamond Invisible Band Ring

18K White Gold 2.40ct Squared Purplish Ruby & 0.10ct Diamond Invisible Band Ring

Located in เกาะสมุย, TH

Product Details: Metal: 18k Solid Gold Metal Color: White Gold Ruby: Natural, purplish-red, squared cut, heat-treatment, 2.40 carats Diamonds: Natural, brilliant cut, VS1, G-H, 0.10...

Category

21st Century and Contemporary Thai Art Deco Band Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

Vintage French 1940s Oval Cut Ruby and Diamond Platinum Cocktail Ring
Vintage French 1940s Oval Cut Ruby and Diamond Platinum Cocktail Ring

Vintage French 1940s Oval Cut Ruby and Diamond Platinum Cocktail Ring

Located in Jesmond, Newcastle Upon Tyne

Ruby Quality Color Red (not heat-treated) Cut Oval Content 0.90 carat Dimensions 6.13mm x 2.65mm Diamond Quality Color (average grades) H Clarity (average grades) SI2 Cut Baguette /...

Category

Vintage 1940s French Art Deco Cocktail Rings

Materials

Diamond, Ruby, Platinum

Colombian Emerald and Ruby Bypass "Toi Et Moi" Ring
Colombian Emerald and Ruby Bypass "Toi Et Moi" Ring

Colombian Emerald and Ruby Bypass "Toi Et Moi" Ring

By Emeralds Maravellous

Located in Brunswick, ME

Estimated Production Time: 3-4 weeks** *Please check the Images and video of the unset natural gemstones that will be used for the stunning ring* Stunning 2.50 Carats Natural Colomb...

Category

21st Century and Contemporary American Art Deco Engagement Rings

Materials

Ruby, Emerald, Diamond, Platinum, Yellow Gold, White Gold, 18k Gold, 14k...

Natural Burmese Ruby Diamond Bracelet 18K White Gold Retro AGL
Natural Burmese Ruby Diamond Bracelet 18K White Gold Retro AGL

Natural Burmese Ruby Diamond Bracelet 18K White Gold Retro AGL

Located in Monaco, MC

The vast majority of rubies on the market — including those from Burma — have been heat-treated to improve color and clarity.

Category

Vintage 1940s American Retro Retro Bracelets

Materials

Diamond, Ruby, White Gold

Certified Gem-Set Emeralds, Rubies, Sapphires, Diamonds ‘Tutti Frutti’ Bracelet.
Certified Gem-Set Emeralds, Rubies, Sapphires, Diamonds ‘Tutti Frutti’ Bracelet.

Certified Gem-Set Emeralds, Rubies, Sapphires, Diamonds ‘Tutti Frutti’ Bracelet.

Located in OVIEDO, AS

Larger ruby evidence of heat treatment; origin Burma. Smaller no evidence of treatment; origin Burma.

Category

Vintage 1970s European Modern Tennis Bracelets

Materials

Diamond, Emerald, Ruby, Sapphire, 14k Gold

14K Gold GIA Ruby Diamond & Carved Emerald 3D Bird on Branch Brooch Pin Pendant
14K Gold GIA Ruby Diamond & Carved Emerald 3D Bird on Branch Brooch Pin Pendant

14K Gold GIA Ruby Diamond & Carved Emerald 3D Bird on Branch Brooch Pin Pendant

Located in Montclair, NJ

--Stone(s):-- (7) Lab Rubies - Old Round Cut - Prong Set - Pinkish Red Color - 3.7-4.2mm (approx.) (3) Natural Genuine Rubies - Oval Cabochon Cut- Burma - No Heat - Prong Set - 2.50c...

Category

21st Century and Contemporary Brooches

Materials

Diamond, Emerald, Ruby, 14k Gold, Yellow Gold

GIA Antique Pigeon Blood Burmese Burma Ruby Rose Cut Diamond Necklace French
GIA Antique Pigeon Blood Burmese Burma Ruby Rose Cut Diamond Necklace French

GIA Antique Pigeon Blood Burmese Burma Ruby Rose Cut Diamond Necklace French

Located in New York, NY

The pendant hangs from an 18 Karat Gold chain. Burmese Rubies 3 Oval and Round Faceted Natural Burmese Rubies The central ruby: 3.92 x 3.34 x 2.52mm and .26 Carats.

Category

Antique 19th Century French Belle Époque Pendant Necklaces

Materials

Pearl, Diamond, Ruby, Gold, 18k Gold, White Gold, Yellow Gold, Silver

18K Gold 0.60ct Squared Muti- Stones & 0.02ct Diamond Fine Vintage Band Ring
18K Gold 0.60ct Squared Muti- Stones & 0.02ct Diamond Fine Vintage Band Ring

18K Gold 0.60ct Squared Muti- Stones & 0.02ct Diamond Fine Vintage Band Ring

Located in เกาะสมุย, TH

Please consider any applicable import duties or taxes in your country when making your offer—we’re happy to work with you to find a fair and satisfying arrangement Product Details: ...

Category

20th Century Cluster Rings

Materials

Emerald, Ruby, Sapphire, Diamond, 18k Gold

GIA Certified Natural Sapphire Gold Dome Earrings
GIA Certified Natural Sapphire Gold Dome Earrings

GIA Certified Natural Sapphire Gold Dome Earrings

Located in Stamford, CT

Handmade yellow gold high dome ruby 3-D earrings. GIA certified, 2 round pink/red sapphires with 42 round pink/red natural sapphires set in 14k yellow gold dome settings. Circa 1950...

Category

Late 20th Century More Earrings

Materials

Pink Sapphire, Sapphire, 14k Gold, Yellow Gold, Gold

Platinum Sapphire Unheated Purple Diamond GIA Ring Antique Old Mine 17.37 CTS!
Platinum Sapphire Unheated Purple Diamond GIA Ring Antique Old Mine 17.37 CTS!

Platinum Sapphire Unheated Purple Diamond GIA Ring Antique Old Mine 17.37 CTS!

Located in Sylvania, GA

GIANT 13.51 CARAT REGAL PURPLE GIA CERTIFIED RARE NO HEAT NATURAL SAPPHIRE.

Category

Antique 19th Century Cocktail Rings

Materials

Diamond, Sapphire, Purple Sapphire, Gold, 18k Gold, Yellow Gold, Platinum

Art Deco Ruby and Diamond Bar Brooch
Art Deco Ruby and Diamond Bar Brooch

Art Deco Ruby and Diamond Bar Brooch

Located in London, GB

An Art Deco ruby and diamond bar brooch, the thirty-six calibre-cut rubies weighing approximately a total of 1.4 carats accompanied by GCS Report stating to be of Burmese origin with...

Category

Vintage 1930s French Art Deco Brooches

Materials

Diamond, Ruby, 18k Gold, Platinum

Recent Sales

Edwardian Burma No Heat Ruby 2.10 Carat Diamond Ring
Edwardian Burma No Heat Ruby 2.10 Carat Diamond Ring

Edwardian Burma No Heat Ruby 2.10 Carat Diamond Ring

Located in Napoli, IT

Eternal, not fearing time, Edwardian rare no heat Burma Ruby of the most vibrant red pigeoun blood colour .65 Ct. is set in a twin version with an oval cushion cut old mine Diamond o...

Category

Antique Early 1900s Edwardian More Rings

Materials

Diamond, Ruby, 18k Gold, Platinum

Magnificent No Heat Ruby Diamond Gold Ring
Magnificent No Heat Ruby Diamond Gold Ring

Magnificent No Heat Ruby Diamond Gold Ring

Located in Miami, FL

About the Item: The timeless brilliance of this ruby and diamond ring—whether for a wedding, anniversary, or everyday occasion—is captured in the dazzling shine created from every a...

Category

21st Century and Contemporary Dome Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

1.70 Carat No Heat Burma Sapphire and Burma Ruby Three-Stone Ring

1.70 Carat No Heat Burma Sapphire and Burma Ruby Three-Stone Ring

By Shreve, Crump & Low

Located in Chestnut Hill, MA

Platinum and 18 karat rose gold 3 stone ring consisting of 1 oval shaped Burma sapphire weighing approximately 1.70 carats flanked by 2 oval shaped Burma rubies having a total weight...

Category

21st Century and Contemporary American Fashion Rings

Materials

Diamond, Ruby, Sapphire, 18k Gold, Platinum

Victorian 1.20 Carat Natural No Heat Ruby Diamond Rare Trilogy Ring
Victorian 1.20 Carat Natural No Heat Ruby Diamond Rare Trilogy Ring

Victorian 1.20 Carat Natural No Heat Ruby Diamond Rare Trilogy Ring

Located in Napoli, IT

Captivating Red Colour Beautiful antique Victorian period three stone ring, 1900 ca Lovely half hoop mounting exquisitely hand carved at best refined work of the time – 18 KT solid ...

Category

Antique Early 1900s Late Victorian Three-Stone Rings

Materials

Diamond, Ruby, 18k Gold

Burmese No Heat 3.31 ct Ruby Diamond Ring
Burmese No Heat 3.31 ct Ruby Diamond Ring

Burmese No Heat 3.31 ct Ruby Diamond Ring

Located in Wimberley, TX

It is as though the red glows from deep within the gem. With no evidence of heat treatment, this Burmese oval brilliant step cut ruby has a known weight of 3.31 carats.

Materials

Ruby, Diamond, Platinum, 18k Gold

1950s No Heat Ruby with Flawless Well Made Diamonds
1950s No Heat Ruby with Flawless Well Made Diamonds

1950s No Heat Ruby with Flawless Well Made Diamonds

Located in Miami, FL

Ring Size: 8.25 Metal: Yellow Gold Metal Purity: 18k Stones: Ruby and Diamonds Ruby Weight: 2 carat Diamond Weight: 3 carat Total Carat Weight: 5 carat Total Item Weight (g): 13.3 T...

Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

18kt Yellow Gold No Heat 4.85cts Ruby and Diamond 3 Stone Ring
18kt Yellow Gold No Heat 4.85cts Ruby and Diamond 3 Stone Ring

18kt Yellow Gold No Heat 4.85cts Ruby and Diamond 3 Stone Ring

Located in Rehoboth Beach, DE

18k Yellow Gold Ruby & Diamond Lady's Three (3) Stone Ring. This Ring Contains One (1) Round Brilliant Cut Ruby Weighing 4.85cts in Total Carat Weight. This Stone Measures Approximat...

Category

21st Century and Contemporary Thai Contemporary Three-Stone Rings

Materials

18k Gold

Vintage 1970s Certified Untreated No Heat 1.4 Carat Burma Ruby Gold Domed Ring
Vintage 1970s Certified Untreated No Heat 1.4 Carat Burma Ruby Gold Domed Ring

Vintage 1970s Certified Untreated No Heat 1.4 Carat Burma Ruby Gold Domed Ring

Located in Berlin, Berlin

The certificate will be delivered with the ring. MATERIALS A natural ruby (no heat, untreated), faceted, approx. 1.40 ct, approx. 8.25 x 6.25 x 2.83 mm / 0.32 x 0.25 x 0.11 inches G...

Category

Vintage 1970s German Retro Dome Rings

Materials

Ruby, 14k Gold, Yellow Gold

French 18 Karat Yellow Gold Cabochon No Heat Ruby and Pave Diamond Ring
French 18 Karat Yellow Gold Cabochon No Heat Ruby and Pave Diamond Ring

French 18 Karat Yellow Gold Cabochon No Heat Ruby and Pave Diamond Ring

Located in New York, NY

According to the GIA Gem report, this ruby weighing 8.24 carats is from Afghanistan and has no indications of any heat treatment, a practice commonly found in rubies.

Category

Vintage 1980s French Contemporary Fashion Rings

Materials

Ruby, Diamond, 18k Gold

Art Deco 2.30 Ct Natural No Heat Siam Ruby 1.0 Ct Old Mine Diamond Trilogy Ring
Art Deco 2.30 Ct Natural No Heat Siam Ruby 1.0 Ct Old Mine Diamond Trilogy Ring

Art Deco 2.30 Ct Natural No Heat Siam Ruby 1.0 Ct Old Mine Diamond Trilogy Ring

Located in Napoli, IT

The Gemstone of Romance An Art Deco Diamond and Ruby three stone ring elegantly crafted of solid 18 KT rose gold Set to the centre with a beautiful and rare to achieve Natural No He...

Category

Vintage 1930s Art Deco Three-Stone Rings

Materials

Diamond, Ruby, 18k Gold, Silver

Victorian .80 Carat Burmese Ruby 1.20 Carat Old Mine Diamond Trilogy Ring
Victorian .80 Carat Burmese Ruby 1.20 Carat Old Mine Diamond Trilogy Ring

Victorian .80 Carat Burmese Ruby 1.20 Carat Old Mine Diamond Trilogy Ring

Located in Napoli, IT

The Rarity Corner This lovely Victorian ring is 1880 ca Traditional trilogy version set with finest earth mined gemstones to be a sought after stand out within all others the gorgeo...

Category

Antique 1880s Victorian Three-Stone Rings

Materials

Diamond, Ruby, 18k Gold

French Edwardian Rare 1.80 Carat Natural Siam Ruby Duo Natural Pearl Rare Ring
French Edwardian Rare 1.80 Carat Natural Siam Ruby Duo Natural Pearl Rare Ring

French Edwardian Rare 1.80 Carat Natural Siam Ruby Duo Natural Pearl Rare Ring

Located in Napoli, IT

The Rarity Corner Magnificent, very unique, Edwardian period panel ring – 1905 ca Boasting glorious workmanship of the time and tasteful panel design set with rarest gems on earth –...

Category

Antique Early 1900s Edwardian Cluster Rings

Materials

Natural Pearl, Ruby, 18k Gold

18K Gold Burma Ruby Diamond Ring SZ 5.5 AGL Certified
18K Gold Burma Ruby Diamond Ring SZ 5.5 AGL Certified

18K Gold Burma Ruby Diamond Ring SZ 5.5 AGL Certified

Located in New York, NY

1 oval-shaped ruby measuring 11.45 x 7.40 x 5.44 mm and stated to weigh 4.65 carats With report 1096983 dated 3 December 2018 from the American Gemological Laboratories stating that ...

Category

Late 20th Century Cocktail Rings

Materials

Diamond, Ruby, 18k Gold

Classic Oval Cut 1.50 Carat Seven Stone Ruby Diamond Ring 18 Karat Yellow Gold
Classic Oval Cut 1.50 Carat Seven Stone Ruby Diamond Ring 18 Karat Yellow Gold

Classic Oval Cut 1.50 Carat Seven Stone Ruby Diamond Ring 18 Karat Yellow Gold

By Brij Nivesh

Located in Hollywood, FL

Natural Diamond Details Pieces : 3 Pieces Weight : 0.55 Carat Clarity of Diamond : VS Colour of Diamond : F/G Natural Mozambique Ruby Details Pieces : 4 Pieces Weight : 0.83 Carat ...

Category

21st Century and Contemporary Indian Contemporary Wedding Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Space Nugget Style Mens European Cut Ruby  Diamond Ring
Space Nugget Style Mens European Cut Ruby  Diamond Ring

Space Nugget Style Mens European Cut Ruby Diamond Ring

Located in Scottsdale, AZ

This gorgeous Aristocrat Jewelry custom production ring carries a simple yet very masculine uniquely Picassoesque negative space nugget style men's ring features on one side Old Euro...

Category

20th Century American Fashion Rings

Materials

Diamond, Ruby, White Diamond, 14k Gold, Yellow Gold

Antique Art Deco, French, Platinum, Large Pink Sapphire and Diamond Ring
Antique Art Deco, French, Platinum, Large Pink Sapphire and Diamond Ring

Antique Art Deco, French, Platinum, Large Pink Sapphire and Diamond Ring

Located in Rochford, Essex

Accompanied by GCS report no. 79221-88, stating that the sapphire weighing 3.45 carats is of Sri Lankan origin, with no indications of heat treatment.

Category

Early 20th Century French Cocktail Rings

Materials

Diamond, Pink Sapphire, Platinum

1.96 Carat Natural Burma No Heat Ruby & Diamond Ring
1.96 Carat Natural Burma No Heat Ruby & Diamond Ring

1.96 Carat Natural Burma No Heat Ruby & Diamond Ring

Located in New York, NY

The 1.96 carat burmese ruby accompanies a gemological report from the American Gemological Lab stating the country of origin as Burma (Myanmar) with No Heat nor any clarity enhanceme...

Category

20th Century British Cluster Rings

Materials

Diamond, Ruby, White Gold, Yellow Gold, 18k Gold

15 Carat Diamond and No Heat Burma Ruby Platinum Bracelet
15 Carat Diamond and No Heat Burma Ruby Platinum Bracelet

15 Carat Diamond and No Heat Burma Ruby Platinum Bracelet

Located in Miami, FL

Platinum Vintage Bracelet Featuring Approximately 10 Carats of Old European Cut Diamonds, G Color, VS Clarity, Accented by 5 Rubies Weighing Approximately 5 Carats Total. Measurem...

Category

20th Century American More Bracelets

Materials

Diamond, Ruby, Platinum

Emilio Jewelry Certified 3.00 Carat No Heat Ruby Ring
Emilio Jewelry Certified 3.00 Carat No Heat Ruby Ring

Emilio Jewelry Certified 3.00 Carat No Heat Ruby Ring

By Emilio!

Located in New York, NY

Showcasing a 3 carat untreated/no heat ruby ring of exceptional quality.

Category

21st Century and Contemporary Three-Stone Rings

Materials

Ruby

GIA Certified No Heat Oval Natural Ruby Weighing 1.18 Carats Gemstone
GIA Certified No Heat Oval Natural Ruby Weighing 1.18 Carats Gemstone

GIA Certified No Heat Oval Natural Ruby Weighing 1.18 Carats Gemstone

By OGI Ltd

Located in New York, NY

Introducing the Exquisite GIA Certified No Heat Oval Natural Ruby Weighing 1.18 Carats Elevate your jewelry collection with this stunning and rare GIA Certified No Heat Oval Natural ...

Category

20th Century American Contemporary Loose Gemstones

Materials

Ruby

GRS 3 Carat Burmese No Heat 'Pigeon Blood' Ruby and Diamond Earring in 18K Gold
GRS 3 Carat Burmese No Heat 'Pigeon Blood' Ruby and Diamond Earring in 18K Gold

GRS 3 Carat Burmese No Heat 'Pigeon Blood' Ruby and Diamond Earring in 18K Gold

Located in Bangkok, TH

A fiery pair of rare Burmese ruby and diamond earrings. The lustrous rubies' vivid and vibrant colours showcases why Burmese rubies are the best. This rare piece will not only help t...

Category

2010s Dangle Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

Vintage 5.02 Carats No Heat Ruby Diamond Platinum Cluster Ring GIA
Vintage 5.02 Carats No Heat Ruby Diamond Platinum Cluster Ring GIA

Vintage 5.02 Carats No Heat Ruby Diamond Platinum Cluster Ring GIA

Located in Philadelphia, PA

Cluster ring centers an oval cut ruby weighing 3.77 carats Transparent and very slightly purplish red in color with no indications of heat - Thai in origin Surrounded by a halo of ...

Category

Late 20th Century Contemporary Cluster Rings

Materials

Diamond, White Diamond, Ruby, Platinum

4.72 Carat AGL Graded No Heat Oval Ruby and Diamond Platinum Ring
4.72 Carat AGL Graded No Heat Oval Ruby and Diamond Platinum Ring

4.72 Carat AGL Graded No Heat Oval Ruby and Diamond Platinum Ring

By Regent Jewelers

Located in Bay Harbor Islands, FL

Ruby and Diamond ring featuring a 4.72 Oval Cut AGL Graded No Heat Ruby prong set in a platinum ring with 120 round brilliant cut diamonds weighing 1.40 carats.

Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Ruby, Platinum

No Heat Burma Ruby by the yard, Ruby Stationary Necklace
No Heat Burma Ruby by the yard, Ruby Stationary Necklace

No Heat Burma Ruby by the yard, Ruby Stationary Necklace

Located in Singapore, SG

Most importantly, every single stone is an earth-mined natural ruby from Mogok, Burma, free from heat treatment or any enhancement.

Category

21st Century and Contemporary Singaporean Art Deco Choker Necklaces

Materials

Ruby, 18k Gold

Platinum AGL Burma No Heat Red Ruby W/ Half Moon Diamond 3 Stone Ring
Platinum AGL Burma No Heat Red Ruby W/ Half Moon Diamond 3 Stone Ring

Platinum AGL Burma No Heat Red Ruby W/ Half Moon Diamond 3 Stone Ring

Located in Montgomery, AL

Platinum AGL Certified Cushion Cut Red Burma Ruby And Half Moon Cut Diamond Ring 5.8 Grams Ring Size 6.5 Oval Burma Red Ruby 1.4 Carats 2 Half Moon Brilliant Cut Diamonds 1.2 Car...

Category

21st Century and Contemporary Three-Stone Rings

Materials

Diamond, Ruby, Platinum

No Heat Ruby and Diamond Earrings 18k c1920s GIA
No Heat Ruby and Diamond Earrings 18k c1920s GIA

No Heat Ruby and Diamond Earrings 18k c1920s GIA

Located in Litchfield, CT

SIZE: 3/4ths of an inch long WEIGHT: 4.8 grams total weight STONES: 3.0 carats total weight of no heat rubies accompanied by GIA report and 3.0 carats total weight of F...

Category

Vintage 1920s Lever-Back Earrings

Materials

Diamond, Ruby, 18k Gold

Victorian Burma No Heat Cabochon Ruby Diamond Gold Ring
Victorian Burma No Heat Cabochon Ruby Diamond Gold Ring

Victorian Burma No Heat Cabochon Ruby Diamond Gold Ring

Located in Beverly Hills, CA

A great original Victorian ring with a rare red Burma ruby. The ruby is certified by AGL as Burma with no indications of heat or other treatment and the weight is approximately 2 1/2...

Category

Antique Late 19th Century Unknown Victorian More Rings

Materials

Diamond, Ruby, 18k Gold

Art Deco 2.12 Carats No Heat Burma Ruby Diamond Platinum Dinner Ring GIA
Art Deco 2.12 Carats No Heat Burma Ruby Diamond Platinum Dinner Ring GIA

Art Deco 2.12 Carats No Heat Burma Ruby Diamond Platinum Dinner Ring GIA

Located in Philadelphia, PA

Bombè dinner ring is navette in shape and centers a cushion cut no heat Burma ruby. Weighing 1.01 carats - transparent with purplish red color and no indications of heat.

Category

Vintage 1920s Art Deco Cocktail Rings

Materials

Diamond, White Diamond, Ruby, Platinum

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3 Carat Ruby No Heat For Sale on 1stDibs

You are likely to find exactly the 3 carat ruby no heat you’re looking for on 1stDibs, as there is a broad range for sale. Every item for sale was constructed with extraordinary care, often using Gold, 18k Gold and White Gold. You can easily find a 84 antique edition and 220 modern creations to choose from as well. Finding the perfect 3 carat ruby no heat may mean sifting through those created during different time periods — you can find an early version that dates to the 18th Century and a newer variation that were made as recently as the 21st Century. There have been many well-made iterations of the classic 3 carat ruby no heat over the years, but those made by Antinori Fine Jewels, Merkaba and Emilio! are often thought to be among the most beautiful. Today, if you’re looking for an oval cut version of this piece and are unable to find the perfect match, our selection also includes cushion cut and emerald cut alternatives. If you’re browsing our inventory for a 3 carat ruby no heat, you’ll find that many are available today for women, but there are still pieces to choose from for unisex and men.

How Much is a 3 Carat Ruby No Heat?

On average, a 3 carat ruby no heat at 1stDibs sells for $19,500, while they’re typically $2,200 on the low end and $940,000 for the highest priced versions of this item.

The Legacy of Ruby in Jewelry Design

This deep red gem is the color of heat and passion — vintage and antique ruby jewelry is perfect for those born in the middle of summer.

Rubies are one of the few gemstones that can give diamonds a run for their money. Just consider the Van Cleef & Arpels “scarf” necklace the Duke of Windsor presented to the Duchess on her 40th birthday, in 1936 — set with diamonds and dripping with rubies, a testament to the deep-red gemstone’s power — or the slippers encrusted with 4,600 rubies that Harry Winston made to commemorate The Wizard of Oz’s golden anniversary. July babies have permission to adorn themselves with this beautiful red stone even when it’s not their birthday.

Rubies are considered precious stones — along with diamonds, sapphires and emeralds — and have a hardness of 9.0 on the Mohs Scale, surpassed only by Moissanite and diamonds. They are composed of corundum, a colorless mineral that is also the basic material of sapphires. In the July birthstone, the red of the gemstone — and the various hues seen in sapphires — are produced by the presence of trace elements. In the case of a ruby, this element is chromium. Rubies range in color from vermilion to a violet red. They are also pleochroic, which means that a stone’s hue can vary depending on the direction of viewing. The most sought-after color is pigeon’s blood: pure red with a hint of blue.

Rubies that are hosted in dolomite marble are the most prized: Because the marble is low in iron, so are the rubies, resulting in a more intense color. Rubies found in basalt, which has a higher iron content, are generally darker and less intense.

When shopping for antique and vintage ruby jewelry, remember that the 4Cs of selecting the perfect diamond — color, clarity, cut and carat — also apply to rubies.

According to the Gemological Institute of America, the color of the July birthstone should be a vibrant to slightly purplish red, and the stone should be clear and inclusion-free. Accordingly, the cut should show off its color and clarity. As for the last criterion, fine rubies more than a carat in weight are rare. Often, large rubies are more expensive than diamonds of comparable weights.

Find a collection of ruby necklaces, ruby rings and other accessories on 1stDibs.