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Unisex Vintage 14k Gold 2.75ct Rectangular GIA Burma Bezel Ruby & Diamond Ring
Unisex Vintage 14k Gold 2.75ct Rectangular GIA Burma Bezel Ruby & Diamond Ring

Unisex Vintage 14k Gold 2.75ct Rectangular GIA Burma Bezel Ruby & Diamond Ring

Located in Montclair, NJ

Corundum Variety: Ruby Geographic Origin: Burma (Myanmar) Treatment: Heated (Moderate Residues) Weight

Category

Late 20th Century Unknown Band Rings

Materials

Diamond, Ruby, 14k Gold, White Gold

9.52 Carat Princess Cut Ruby Channel Set Tennis Bracelet in 18 Karat Yellow Gold
9.52 Carat Princess Cut Ruby Channel Set Tennis Bracelet in 18 Karat Yellow Gold

9.52 Carat Princess Cut Ruby Channel Set Tennis Bracelet in 18 Karat Yellow Gold

Located in Scottsdale, AZ

: Red Mineral Type: Natural Corundum Variety: Ruby Bracelet Weight: 26.1 grams Bracelet Length: 7 1/8

Category

21st Century and Contemporary Unknown Contemporary Tennis Bracelets

Materials

Ruby, Gold, 18k Gold, Yellow Gold

18k Two Tone Gold 17.48ct GIA Pear Ruby & Diamond Large Drop Chandelier Earrings
18k Two Tone Gold 17.48ct GIA Pear Ruby & Diamond Large Drop Chandelier Earrings

18k Two Tone Gold 17.48ct GIA Pear Ruby & Diamond Large Drop Chandelier Earrings

Located in Montclair, NJ

: Pavilion: Step Cut Transparency: Transparent Color: Red Species: Natural Corundum Variety: Two (2) Rubies

Category

2010s Unknown Chandelier Earrings

Materials

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

3.02 Carat Cushion Cut Burma Ruby & Round Diamond Ring in Platinum & 18K Gold
3.02 Carat Cushion Cut Burma Ruby & Round Diamond Ring in Platinum & 18K Gold

3.02 Carat Cushion Cut Burma Ruby & Round Diamond Ring in Platinum & 18K Gold

By Gad & Co.

Located in Miami, FL

: - Type: Natural Corundum (natural ruby) - Carat: 3.02 - Origin: Burma (Myanmar) - Cut: Cushion - Color

Category

2010s Burmese Modern Cocktail Rings

Materials

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

Antique Arts & Crafts 12k Gold GIA Sapphire Ruby & Emerald Swirl Leaf Brooch Pin
Antique Arts & Crafts 12k Gold GIA Sapphire Ruby & Emerald Swirl Leaf Brooch Pin

Antique Arts & Crafts 12k Gold GIA Sapphire Ruby & Emerald Swirl Leaf Brooch Pin

Located in Montclair, NJ

Report Number: 5201756738 Stone Type: Natural Corundum - Natural Ruby Stone Shape: Cushion Cutting Style

Category

Vintage 1910s Arts and Crafts Brooches

Materials

Diamond, Emerald, Ruby, Sapphire, Gold

New Platinum AGL & GIA Cushion Pink Sapphire Burma Ruby & Half Moon Diamond Ring
New Platinum AGL & GIA Cushion Pink Sapphire Burma Ruby & Half Moon Diamond Ring

New Platinum AGL & GIA Cushion Pink Sapphire Burma Ruby & Half Moon Diamond Ring

Located in Montclair, NJ

sees it as a Ruby - Burma NO HEAT and one as a Pink Sapphire NO HEAT - The bottom line is this is a

Category

2010s American Engagement Rings

Materials

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

18k Gold 1.51ctw GIA No Heat Cushion Vivid Red Ruby & Diamond Flower Halo Ring
18k Gold 1.51ctw GIA No Heat Cushion Vivid Red Ruby & Diamond Flower Halo Ring

18k Gold 1.51ctw GIA No Heat Cushion Vivid Red Ruby & Diamond Flower Halo Ring

Located in Montclair, NJ

: Transparent Color: Red Species: Natural Corundum Variety: Natural Ruby Geographic Origin: Mozambique Treatment

Category

2010s American Solitaire Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

18k Large Cabachon Natural Ruby, 4.54 CTS, and Pave Diamond Dome Ring, GIA Cert
18k Large Cabachon Natural Ruby, 4.54 CTS, and Pave Diamond Dome Ring, GIA Cert

18k Large Cabachon Natural Ruby, 4.54 CTS, and Pave Diamond Dome Ring, GIA Cert

Located in Fairfield, CT

Weight: 6.3 gross dwt Ruby: Species: Natural Corundum Variety: Natural Ruby Geographic Origin: East

Category

20th Century Unknown Contemporary Dome Rings

Materials

Diamond, Ruby, White Diamond, 18k Gold

New 14k Rose Gold 3.28ct GIA Oval Burma Ruby w/ Diamond Halo Engagement Ring
New 14k Rose Gold 3.28ct GIA Oval Burma Ruby w/ Diamond Halo Engagement Ring

New 14k Rose Gold 3.28ct GIA Oval Burma Ruby w/ Diamond Halo Engagement Ring

Located in Montclair, NJ

Transparency: Transparent Color: Red Species: Natural Corundum Variety: Ruby Geographic Origin: Burma (Myanmar

Category

2010s American Engagement Rings

Materials

Diamond, Ruby, 14k Gold, Rose Gold

A. Jaffe Ladies 18K Green & White Gold Sapphire Rubies Diamond Cocktail Ring Set
A. Jaffe Ladies 18K Green & White Gold Sapphire Rubies Diamond Cocktail Ring Set

A. Jaffe Ladies 18K Green & White Gold Sapphire Rubies Diamond Cocktail Ring Set

Located in Houston, TX

Corundum Variety: Natural Ruby Measurements: 6.98mm x 5.03mm Weight Range: 0.876 ct. - 0.900 ct. Total

Category

21st Century and Contemporary Sri Lankan Cocktail Rings

Materials

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

Vintage Retro 14k Gold & Platinum GIA Burma No Heat Ruby Diamond Ribbon Bar Pin
Vintage Retro 14k Gold & Platinum GIA Burma No Heat Ruby Diamond Ribbon Bar Pin

Vintage Retro 14k Gold & Platinum GIA Burma No Heat Ruby Diamond Ribbon Bar Pin

Located in Montclair, NJ

Transparency: Transparent Color: Purplish Red Species: Natural Corundum Variety: Two (2) Natural Rubies

Category

Vintage 1940s Retro Brooches

Materials

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

Italian 18K Gold Hand Painted Miniature Lady Portrait Brooch/Pendant
Italian 18K Gold Hand Painted Miniature Lady Portrait Brooch/Pendant

Italian 18K Gold Hand Painted Miniature Lady Portrait Brooch/Pendant

Located in Guaynabo, PR

-Kimberly diamonds). She has also a brooch embellished by a tiny ruby (Corundum) in the center of her green

Category

20th Century Italian Baroque Brooches

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

2.25 Carat GIA Certified Fancy Orange Brown Diamond Burmese Red Spinel Ring
2.25 Carat GIA Certified Fancy Orange Brown Diamond Burmese Red Spinel Ring

2.25 Carat GIA Certified Fancy Orange Brown Diamond Burmese Red Spinel Ring

By Joke Quick

Located in Antwerp, BE

, including Burmese poppy red spinels, rubies, and white diamonds. These stones complement each other to

Category

2010s Belgian Contemporary Fashion Rings

Materials

Diamond, Brown Diamond, Ruby, Spinel, 18k Gold

14K Yellow Gold White Sapphire and Green Tsavorite Ring, 1.65ct
14K Yellow Gold White Sapphire and Green Tsavorite Ring, 1.65ct

14K Yellow Gold White Sapphire and Green Tsavorite Ring, 1.65ct

By Aria Jewelry Design

Located in Raleigh, NC

associated with purity and divine protection. Sapphires are part of the corundum family, with red corundum

Category

21st Century and Contemporary American Artisan Cocktail Rings

Materials

Tsavorite, Other, Sapphire, 14k Gold, Yellow Gold

Multi-Color Sapphire Nugget Necklace with Gold Vermeil Clasp, 25\"
Multi-Color Sapphire Nugget Necklace with Gold Vermeil Clasp, 25\"

Multi-Color Sapphire Nugget Necklace with Gold Vermeil Clasp, 25\"

By Aria Jewelry Design

Located in Raleigh, NC

corundum family, which also includes Rubies. The color variations in Sapphires are due to the presence of

Category

21st Century and Contemporary American Artisan Beaded Necklaces

Materials

Sapphire, Vermeil

Certified Padparadscha Sapphire and Diamond Key Pendant in 18K White Gold
Certified Padparadscha Sapphire and Diamond Key Pendant in 18K White Gold

Certified Padparadscha Sapphire and Diamond Key Pendant in 18K White Gold

Located in Kowloon, HK

. Padparadscha is the only corundum variety other than ruby, which is given its own

Category

2010s Hong Kong Art Deco Pendant Necklaces

Materials

Diamond, Sapphire, Padparadscha Sapphire , 18k Gold, White Gold

Certified Padparadscha Sapphire Butterfly 18K White Gold Ring and Pendant
Certified Padparadscha Sapphire Butterfly 18K White Gold Ring and Pendant

Certified Padparadscha Sapphire Butterfly 18K White Gold Ring and Pendant

Located in Kowloon, HK

rubies. ... Padparadscha is the only variety of corundum other than ruby that is given its own

Category

2010s Hong Kong Art Deco Cocktail Rings

Materials

Sapphire, Padparadscha Sapphire , White Gold

"Chocolate Drop" Brown Sapphire Slice Earrings in 18 Karat Gold with Diamonds
"Chocolate Drop" Brown Sapphire Slice Earrings in 18 Karat Gold with Diamonds

"Chocolate Drop" Brown Sapphire Slice Earrings in 18 Karat Gold with Diamonds

By Eytan Brandes

Located in Sherman Oaks, CA

distinctive silky, soulful shimmer that you only find with rough corundum (i.e., rubies and sapphires

Category

2010s American Contemporary Dangle Earrings

Materials

Diamond, White Diamond, Sapphire, Gold, 18k Gold, Yellow Gold

Unheated Burma Ruby Torsade Necklace with Cartier Ruby Diamond Clasp

Unheated Burma Ruby Torsade Necklace with Cartier Ruby Diamond Clasp

Located in Dallas, TX

Approximately 600.00 ctw. AGL Certified "Unheated" natural Burma corundum ruby bead necklace with

Category

20th Century Beaded Necklaces

Materials

Diamond, Ruby, Yellow Gold, 18k Gold

Vintage Ruby Turquoise Gold Cocktail Ring
Vintage Ruby Turquoise Gold Cocktail Ring

Vintage Ruby Turquoise Gold Cocktail Ring

Located in Lisbon, PT

corundum Rubies originating from Myanmar (Burma). Top of ring measures 30mm by 25mm and shank measures 4mm

Category

Vintage 1970s Cocktail Rings

Materials

Ruby, Turquoise, Gold

Sapphires Including Yellow, Blue, Pink, Green, Padparadscha, Kashmir and Others

Sapphires Including Yellow, Blue, Pink, Green, Padparadscha, Kashmir and Others

Located in London, GB

We offer a wide range off corundum (ruby and sapphire) available in every tone and hue. When most

Category

2010s Sri Lankan Contemporary More Jewelry

Materials

Ruby, Sapphire, Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sap...

Magnificent Ruby Corundum and Diamond Drop Earrings
Magnificent Ruby Corundum and Diamond Drop Earrings

Magnificent Ruby Corundum and Diamond Drop Earrings

Located in Toronto, Ontario

cut Rubies. The tops of the earrings measure 22mm x 28mm with substantial Omega Clip and Post backs

Category

20th Century Unknown Drop Earrings

Materials

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

Sweet Pea Pogo Punk 18 Karat Yellow Gold, Sapphire, Ruby and Corundum Necklace
Sweet Pea Pogo Punk 18 Karat Yellow Gold, Sapphire, Ruby and Corundum Necklace

Sweet Pea Pogo Punk 18 Karat Yellow Gold, Sapphire, Ruby and Corundum Necklace

By Sweet Pea

Located in London, GB

red ruby, blue sapphire and white corundum precious beads. The total length is 38cm but this can be

Category

21st Century and Contemporary British Contemporary Chain Necklaces

Materials

Ruby, Blue Sapphire, Yellow Gold

Burma 14.83 Carat Corundum in Platinum Diamond Ring
Burma 14.83 Carat Corundum in Platinum Diamond Ring

Burma 14.83 Carat Corundum in Platinum Diamond Ring

By Peter Atman

Located in New York, NY

A very large and unique stone has divided the Gemological community, one Lab calls it a Ruby and

Category

2010s American Contemporary More Rings

Materials

Diamond, Ruby, Pink Sapphire, Platinum

Antique Ruby Stick Pin
Antique Ruby Stick Pin

Antique Ruby Stick Pin

Unavailable|$7,885

Antique Ruby Stick Pin

Located in METAIRIE, LA

those born in the month of July.. *The rarest of the Corundum gems.. Approximately 75% of Rubies sold

Category

Antique Early 1900s Brooches

Materials

Ruby, 14k Gold

GIA Certified 2.06 Carat Round Ruby
GIA Certified 2.06 Carat Round Ruby

GIA Certified 2.06 Carat Round Ruby

Located in LA, CA

2.06 carats Round Ruby 7.61 - 7.68 x 4.20 mm GIA #2225208024 The corundum family of minerals

Category

2010s Loose Gemstones

Materials

Ruby

Natural Ruby of 3.23 carat
Natural Ruby of 3.23 carat

Natural Ruby of 3.23 carat

Unavailable|$1,599

Natural Ruby of 3.23 carat

Located in Vadgam, IN

Beautiful Pink Red Color Ruby Loose Gemstone Species - Natural Corundum Gemstone Type - Natural

Category

21st Century and Contemporary Unknown More Jewelry

Materials

Ruby

GIA Certified 1.96 Carat Oval Shape Ruby
GIA Certified 1.96 Carat Oval Shape Ruby

GIA Certified 1.96 Carat Oval Shape Ruby

Located in LA, CA

uncommon than diamonds. The red variety of the mineral corundum is called ruby.

Category

2010s Loose Gemstones

Materials

Ruby

GIA Certified 2.18 Carat Oval Shape Natural Ruby
GIA Certified 2.18 Carat Oval Shape Natural Ruby

GIA Certified 2.18 Carat Oval Shape Natural Ruby

Located in LA, CA

rubies are even more uncommon than diamonds. The red variety of the mineral corundum is called ruby.

Category

2010s Loose Gemstones

Materials

Ruby

CD Certified 17.00 ct Triple Ruby Ring
CD Certified 17.00 ct Triple Ruby Ring

CD Certified 17.00 ct Triple Ruby Ring

Located in Boca Raton, FL

An elegant ring consisting of three rubies delicately accented by several diamonds. Total Weight

Category

2010s Three-Stone Rings

Materials

Ruby

GIA Certified 0.83 Carat Octagonal Natural Burma Ruby
GIA Certified 0.83 Carat Octagonal Natural Burma Ruby

GIA Certified 0.83 Carat Octagonal Natural Burma Ruby

Located in LA, CA

-30 The rarest and most expensive member of the corundum family is the Burma Ruby. The finest color

Category

2010s Loose Gemstones

Materials

Ruby

23 Karat Yg Ruby and Diamond Necklace
23 Karat Yg Ruby and Diamond Necklace

23 Karat Yg Ruby and Diamond Necklace

Located in Santa Fe, NM

23kt y/g Ruby & Diamond Necklace. Ruby/Corundum=281.35ct

Category

20th Century Unknown Beaded Necklaces

Materials

Diamond, Ruby, Yellow Gold

CDC Certified 5.25 Carat Ruby - Round ( Pair ) Heated ( Madagascar )
CDC Certified 5.25 Carat Ruby - Round ( Pair ) Heated ( Madagascar )

CDC Certified 5.25 Carat Ruby - Round ( Pair ) Heated ( Madagascar )

Located in New York, NY

Ruby ( Natural Corundum) Intense Red Round Shape ( Pair ) Heated Origin From Madagascar.

Category

21st Century and Contemporary Malagasy Modern Loose Gemstones

Materials

Ruby

6.95 Carat Pear Shaped Ruby and Diamond Ring
6.95 Carat Pear Shaped Ruby and Diamond Ring

6.95 Carat Pear Shaped Ruby and Diamond Ring

Located in Boca Raton, FL

Corundum Variety : Ruby Shape : Pear Color : Red Transparency : Translucent Weight : 6.95 ct Measurements

Category

2010s Art Deco Cocktail Rings

Materials

Diamond, Ruby, White Gold

Natural Ruby Rondelle Beaded Necklace with Interlocking Ring Clasp
Natural Ruby Rondelle Beaded Necklace with Interlocking Ring Clasp

Natural Ruby Rondelle Beaded Necklace with Interlocking Ring Clasp

By Rocat Designs

Located in Tucson, AZ

simply stunning. It is a truly special piece. Ruby is precious variety of corundum. The name ruby comes

Category

2010s American Beaded Necklaces

Materials

Ruby, Sterling Silver

Natural Red Ruby Pear Shaped Earring Studs 14k White Gold
Natural Red Ruby Pear Shaped Earring Studs 14k White Gold

Natural Red Ruby Pear Shaped Earring Studs 14k White Gold

Located in Montréal, CA

Pair of two natural, untreated vintage pear shaped red ruby (corundum) stud earrings in a prong

Category

1990s European Contemporary Stud Earrings

Materials

Ruby, 14k Gold, White Gold

Natural Ruby Rondelle Beaded Necklace with Handmade Chevron Inlay Toggle Clasp
Natural Ruby Rondelle Beaded Necklace with Handmade Chevron Inlay Toggle Clasp

Natural Ruby Rondelle Beaded Necklace with Handmade Chevron Inlay Toggle Clasp

By Rocat Designs

Located in Tucson, AZ

these beads is simply stunning. It is a truly special piece. Ruby is precious variety of corundum. The

Category

2010s American Beaded Necklaces

Materials

Ruby, Sterling Silver

Diamond and Red Ruby 18 Karat White Gold Ring
Diamond and Red Ruby 18 Karat White Gold Ring

Diamond and Red Ruby 18 Karat White Gold Ring

Located in Toronto, Ontario

calibre cut tapered baguette natural Red Rubies (Corundums) totaling .55 carat and further embellished

Category

21st Century and Contemporary Canadian More Rings

Materials

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

Natural Ruby 14-15mm Rondelle Beaded Necklace with Freshwater Pearl Toggle Clasp
Natural Ruby 14-15mm Rondelle Beaded Necklace with Freshwater Pearl Toggle Clasp

Natural Ruby 14-15mm Rondelle Beaded Necklace with Freshwater Pearl Toggle Clasp

By Rocat Designs

Located in Tucson, AZ

corundum. The name ruby comes from ruber, which is the Latin word for red. Its color is due to the presence

Category

2010s American Beaded Necklaces

Materials

Freshwater Pearl, Ruby, Sterling Silver

Rhodium Plated 925 Sterling Silver with Enamels Clownfish Shaped Brooch
Rhodium Plated 925 Sterling Silver with Enamels Clownfish Shaped Brooch

Rhodium Plated 925 Sterling Silver with Enamels Clownfish Shaped Brooch

By Cameo Italiano - Diluca S.R.L

Located in Marcianise, IT

sterling silve plated with black rhodium and embellished with synthetic ruby corundum stone and white

Category

2010s Italian Arts and Crafts Brooches

Materials

Zircon, Rhodium, Sterling Silver, Enamel

Wonderful Large Round 2.60ct BLUE Sapphire (Chantaburi or Trat)
Wonderful Large Round 2.60ct BLUE Sapphire (Chantaburi or Trat)

Wonderful Large Round 2.60ct BLUE Sapphire (Chantaburi or Trat)

Located in Methuen, MA

likely heated, as most Sapphire, Ruby, Aquamarine, Tanzanite, Tourmaline and other gemstones are

Category

Early 2000s Asian Loose Gemstones

Materials

Blue Sapphire

UNHEATED ORANGE Sapphire, 1.33ct, Madagascar  (No Treatment at all)
UNHEATED ORANGE Sapphire, 1.33ct, Madagascar  (No Treatment at all)

UNHEATED ORANGE Sapphire, 1.33ct, Madagascar (No Treatment at all)

Located in Methuen, MA

photos. As noted, above and in the screen grab photo, 99% of Corundum (Corundum = Sapphire & Ruby) is

Category

2010s African Loose Gemstones

Materials

Sapphire

1.88ct Oval Muzo Emerald And Diamond Engagement Ring
1.88ct Oval Muzo Emerald And Diamond Engagement Ring

1.88ct Oval Muzo Emerald And Diamond Engagement Ring

By Harlin Jones

Located in Sydney, NSW

precious colored stones, along with sapphire and ruby (both corundum), making it a popular choice for

Category

21st Century and Contemporary Australian Modern Engagement Rings

Materials

Diamond, Emerald, 18k Gold

RealJade Classic Bangle Genuine Burmese High-End Green Jadeite Bangle Bracelet
RealJade Classic Bangle Genuine Burmese High-End Green Jadeite Bangle Bracelet

RealJade Classic Bangle Genuine Burmese High-End Green Jadeite Bangle Bracelet

Located in Portland, OR

hardness scale, just a little bit under sapphire/rubies (corundum). Making jade a perfect stone for a daily

Category

21st Century and Contemporary American Artist Bangles

Materials

Jade

Genuine Burmese High Quality Jadeite Jade Bangle Bracelet (53.4mm) #525
Genuine Burmese High Quality Jadeite Jade Bangle Bracelet (53.4mm) #525

Genuine Burmese High Quality Jadeite Jade Bangle Bracelet (53.4mm) #525

Located in Portland, OR

hardness scale, just a little bit under sapphire/rubies (corundum). Making jade a perfect stone for a daily

Category

21st Century and Contemporary Asian Artist Bangles

Materials

Jade

Freeform Corundum Ruby & Diamond Halo Cocktail Ring
Freeform Corundum Ruby & Diamond Halo Cocktail Ring

Freeform Corundum Ruby & Diamond Halo Cocktail Ring

Located in Webster, NY

Free form Corundum Ruby & Diamond Ring crafted in 18k White Gold. Gemstone: Corundum Ruby

Category

20th Century Cocktail Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

Large 8.89 Carat Natural Corundum Ruby and Diamond 18 Karat White Gold Ring
Large 8.89 Carat Natural Corundum Ruby and Diamond 18 Karat White Gold Ring

Large 8.89 Carat Natural Corundum Ruby and Diamond 18 Karat White Gold Ring

Located in Tustin, CA

Magnificent large oval cut natural corundum ruby is prong set in 18 karat white gold and surrounded

Category

21st Century and Contemporary American Contemporary Cocktail Rings

Materials

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

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Corundum Ruby For Sale on 1stDibs

You are likely to find exactly the corundum ruby you’re looking for on 1stDibs, as there is a broad range for sale. Each design created in this style — which was crafted with great care and often made from Gold, 18k Gold and White Gold — can elevate any look. Find an antique version now, or shop for 6 vintage or 8 modern creation for a more contemporary example of these cherished accessories. Making the right choice when shopping for a corundum ruby may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 19th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. A corundum ruby from Peter Atman and Sweet Pea — each of whom created a beautiful version of this treasured accessory — is worth considering. An oval cut version of this piece has appeal, but there are also cushion cut and pear cut versions for sale.

How Much is a Corundum Ruby?

The price for a corundum ruby starts at $786 and tops out at $165,000 with these rings, on average, selling for $13,700.

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.