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RETRO earrings with ruby and rose cut diamonds 18k gold and silver
RETRO earrings with ruby and rose cut diamonds 18k gold and silver

RETRO earrings with ruby and rose cut diamonds 18k gold and silver

Located in The Hague, ZH

weight: 6.3 grams Set with: - 2 x 1.7 mm round facet-cut heated rubies, totaling approximately 0.05

Category

Vintage 1950s Dutch Retro Clip-on Earrings

Materials

Diamond, Ruby, 18k Gold, Silver

14k Yellow Gold Bicolor Pendant Necklace with Ruby, Sapphire, Diamonds
14k Yellow Gold Bicolor Pendant Necklace with Ruby, Sapphire, Diamonds

14k Yellow Gold Bicolor Pendant Necklace with Ruby, Sapphire, Diamonds

Located in The Hague, ZH

: - 1 x 4.6 mm round old mine cut cut heated ruby, approximately 0.50 carats in total color red purity

Category

1990s Dutch Modern Pendant Necklaces

Materials

Diamond, Ruby, Sapphire, 14k Gold, Yellow Gold

Ring with ruby verneuille and old mine cut diamonds up to 0.30ct 14k gold
Ring with ruby verneuille and old mine cut diamonds up to 0.30ct 14k gold

Ring with ruby verneuille and old mine cut diamonds up to 0.30ct 14k gold

Located in The Hague, ZH

heated ruby ​​verneuille Color: Red Clarity: VS/SI Gemstones are often treated to enhance color or

Category

Vintage 1950s Dutch Retro Three-Stone Rings

Materials

Diamond, Ruby, 14k Gold

Natural Oval Ruby and Marquise Diamond Butterfly Engagement Ring in Yellow Gold
Natural Oval Ruby and Marquise Diamond Butterfly Engagement Ring in Yellow Gold

Natural Oval Ruby and Marquise Diamond Butterfly Engagement Ring in Yellow Gold

Located in Hong Kong, HK

Yellow Gold • Gemstone Cut: Oval natural heated Ruby with GIA Certificate • Number of Ruby and Size : 1

Category

2010s Hong Kong Artisan Cluster Rings

Materials

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

Necklace and pendant with ruby and brilliant cut diamonds up to 0.30ct 18k gold
Necklace and pendant with ruby and brilliant cut diamonds up to 0.30ct 18k gold

Necklace and pendant with ruby and brilliant cut diamonds up to 0.30ct 18k gold

Located in The Hague, ZH

square facet-cut heated ruby, totaling 0.94 carats Color: Red Clarity: VS/SI Gemstones are often treated

Category

2010s Dutch Modern Pendant Necklaces

Materials

Diamond, Ruby, 18k Gold

Earrings with ruby, coral and brilliant cut diamonds up to 1.26ct 14k gold
Earrings with ruby, coral and brilliant cut diamonds up to 1.26ct 14k gold

Earrings with ruby, coral and brilliant cut diamonds up to 1.26ct 14k gold

Located in The Hague, ZH

: - 12 x 2.0 mm x 1.5 mm princess-cut facet-cut heated ruby, totaling approximately 0.80 carat Color

Category

2010s Dutch Art Deco Dangle Earrings

Materials

Coral, Diamond, Ruby, 14k Gold

Necklace and pendant with ruby, emerald, sapphire and diamonds 18k gold
Necklace and pendant with ruby, emerald, sapphire and diamonds 18k gold

Necklace and pendant with ruby, emerald, sapphire and diamonds 18k gold

Located in The Hague, ZH

- 9 x 1.4 mm round facet cut heated ruby, approximately 0.10 carats in total color red purity VS/SI

Category

2010s Ukrainian Modern Pendant Necklaces

Materials

Diamond, Emerald, Ruby, Sapphire, 18k 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

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

Located in Jesmond, Newcastle Upon Tyne

A stunning, fine and impressive antique 1.03ct Thai ruby and 0.28 carat diamond, 18 karat yellow

Category

Vintage 1930s Unknown Cluster Rings

Materials

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

Necklace and pendant with ruby and European/single cut diamonds 18k yellow gold
Necklace and pendant with ruby and European/single cut diamonds 18k yellow gold

Necklace and pendant with ruby and European/single cut diamonds 18k yellow gold

Located in The Hague, ZH

grams occupied with: - 16 x 1.4 mm round facet cut heated ruby, approximately 0.20 carats in total

Category

Vintage 1950s Dutch Retro Pendant Necklaces

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Ruby Emerald Sapphire Beads with Gold Chain Necklace
Ruby Emerald Sapphire Beads with Gold Chain Necklace

Ruby Emerald Sapphire Beads with Gold Chain Necklace

Located in Hong Kong, HK

This exquisite necklace features a captivating combination of heated rubies from Mozambique

Category

2010s Hong Kong Contemporary Beaded Necklaces

Materials

Emerald, Ruby, Sapphire

ART DECO brooch with ruby and old mine cut diamonds up to 0.50ct 18k gold 5.9 gr
ART DECO brooch with ruby and old mine cut diamonds up to 0.50ct 18k gold 5.9 gr

ART DECO brooch with ruby and old mine cut diamonds up to 0.50ct 18k gold 5.9 gr

Located in The Hague, ZH

square shape cut heated ruby, approximately 1.00 carats in total color red purity VS/SI Gemstones have

Category

Vintage 1910s Dutch Art Deco Brooches

Materials

Diamond, Ruby, 18k Gold

Harry Winston Vintage Ruby Diamond Necklace Suite, circa 1980s
Harry Winston Vintage Ruby Diamond Necklace Suite, circa 1980s

Harry Winston Vintage Ruby Diamond Necklace Suite, circa 1980s

By Harry Winston

Located in New York, NY

heart-shaped Thai heated rubies (4.81 and 4.78 carats) accompanied by 12 carats of diamonds, exuding a

Category

Vintage 1980s American Contemporary Choker Necklaces

Materials

Diamond, Ruby, Platinum

Earrings with pink quartz, ruby and single cut diamonds up to 0.20ct 18k gold
Earrings with pink quartz, ruby and single cut diamonds up to 0.20ct 18k gold

Earrings with pink quartz, ruby and single cut diamonds up to 0.20ct 18k gold

Located in The Hague, ZH

2.2 mm marquise-shaped facet-cut heated ruby, totaling approximately 1.00 carat Color: Red Clarity

Category

2010s Dutch Modern Stud Earrings

Materials

Diamond, Quartz, Ruby, 18k Gold

Bracelet with ruby and single cut diamonds up to 4.00ct 18k gold and platinum
Bracelet with ruby and single cut diamonds up to 4.00ct 18k gold and platinum

Bracelet with ruby and single cut diamonds up to 4.00ct 18k gold and platinum

Located in The Hague, ZH

round facet-cut heated ruby, totaling approximately 2.00 carats Color: Red Clarity: VS/SI Gemstones are

Category

Vintage 1950s Dutch Retro Retro Bracelets

Materials

Diamond, Ruby, 18k Gold, Platinum

Gay Freres -18k gold with ruby, brilliant cut diamonds up to 7.00ct and hematite
Gay Freres -18k gold with ruby, brilliant cut diamonds up to 7.00ct and hematite

Gay Freres -18k gold with ruby, brilliant cut diamonds up to 7.00ct and hematite

By Gay Freres

Located in The Hague, ZH

weight 100.2 grams set with - 5 x 2.9 mm - 2.2 mm x 2.0 mm baquet shape cut heated ruby, approximately

Category

1990s Dutch Modern Beaded Necklaces

Materials

Diamond, Hematite, Ruby, 18k Gold

Ruby Diamond Necklace Earrings Set Chandelier Design Ella Gafter
Ruby Diamond Necklace Earrings Set Chandelier Design Ella Gafter

Ruby Diamond Necklace Earrings Set Chandelier Design Ella Gafter

By Ella Gafter

Located in New York, NY

The ruby and diamond necklace and earrings chandelier set is constituted by faceted heated rubies

Category

21st Century and Contemporary Italian Artist Drop Necklaces

Materials

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

Oval Ruby Burma GRS Certificate and Marquise Diamond Unique Engagement Ring
Oval Ruby Burma GRS Certificate and Marquise Diamond Unique Engagement Ring

Oval Ruby Burma GRS Certificate and Marquise Diamond Unique Engagement Ring

Located in Hong Kong, HK

Heated Ruby - GRS# 2019-093234 (Another ruby will be replaced if it is sold out) - 6 Round Brilliant cut

Category

2010s Modern Engagement Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Brooch with ruby, sapphire, emerald and single cut diamonds gold and silver
Brooch with ruby, sapphire, emerald and single cut diamonds gold and silver

Brooch with ruby, sapphire, emerald and single cut diamonds gold and silver

Located in The Hague, ZH

: - 17 x 1.7 mm – 3.4 mm round facet-cut heated ruby, totaling approximately 1.00 carat Color: Red

Category

2010s Dutch Early Victorian Brooches

Materials

Diamond, Emerald, Ruby, Sapphire, Gold, 10k Gold, Silver

Ring with ruby and old mine cut diamonds up to 0.30ct 18k gold
Ring with ruby and old mine cut diamonds up to 0.30ct 18k gold

Ring with ruby and old mine cut diamonds up to 0.30ct 18k gold

Located in The Hague, ZH

mm old mine cut oil-heated ruby ​​total approx. 0.35 carat color : red clarity : SI Gemstones are

Category

Vintage 1910s Dutch Art Nouveau Cocktail Rings

Materials

Diamond, Ruby, 18k Gold

Schmuckzicke 18kt White Gold CRIMSON RED AAA+ Ruby & Diamond Necklace Mozambique
Schmuckzicke 18kt White Gold CRIMSON RED AAA+ Ruby & Diamond Necklace Mozambique

Schmuckzicke 18kt White Gold CRIMSON RED AAA+ Ruby & Diamond Necklace Mozambique

$10,914

H 0.08 in W 0.08 in D 0.08 in Dm 0.08 in L 17.52 in

Schmuckzicke 18kt White Gold CRIMSON RED AAA+ Ruby & Diamond Necklace Mozambique

Located in Viena, Viena

Mozambique, a more passionate red is hard to find, 3 untreated (not heated) rubies from Mozambique total

Category

2010s Italian Modern Drop Necklaces

Materials

Diamond, Ruby, 18k Gold, White Gold

18k Pink Gold Ruby Sapphire Diamond 14k pink gold Pendant Necklace, Circa 1990
18k Pink Gold Ruby Sapphire Diamond 14k pink gold Pendant Necklace, Circa 1990

18k Pink Gold Ruby Sapphire Diamond 14k pink gold Pendant Necklace, Circa 1990

Located in The Hague, ZH

Set with: - 2 x 2.0 mm brilliant cut heated ruby, approximately 0.05 carats in total color red

Category

1990s Dutch Modern Pendant Necklaces

Materials

Diamond, Ruby, Sapphire, Gold, 14k Gold, 18k Gold

Ring with emerald, sapphire, ruby and brilliant cut diamond 18k gold 12.0 grams
Ring with emerald, sapphire, ruby and brilliant cut diamond 18k gold 12.0 grams

Ring with emerald, sapphire, ruby and brilliant cut diamond 18k gold 12.0 grams

Located in The Hague, ZH

brilliant cut heated ruby ​​approx. 0.10 ct in total color red purity VS-SI - 2 x 2.3 mm brilliant cut

Category

2010s Dutch Modern Cocktail Rings

Materials

Diamond, Emerald, Ruby, Sapphire, 18k Gold

Ring with ruby and brilliant cut diamonds up to 0.43ct 14k gold 6.8 grams
Ring with ruby and brilliant cut diamonds up to 0.43ct 14k gold 6.8 grams

Ring with ruby and brilliant cut diamonds up to 0.43ct 14k gold 6.8 grams

Located in The Hague, ZH

heated ruby, totaling approximately 0.50 carat Color: Red Clarity: VS/SI Gemstones are often treated to

Category

2010s Dutch Modern Cocktail Rings

Materials

Diamond, Ruby, 14k Gold

2.01 Carat Natural Burmese Ruby Ring Set in Platinum Certified by GIA
2.01 Carat Natural Burmese Ruby Ring Set in Platinum Certified by GIA

2.01 Carat Natural Burmese Ruby Ring Set in Platinum Certified by GIA

Located in Tokyo, JP

A beautiful Engagement Ring featuring a 2.01 Carat, GIA Certified, Natural, Burmese Heated Ruby and

Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Ruby, Platinum

set of five rings 18k gold with sapphire, ruby, emerald and diamonds 0.50ct
set of five rings 18k gold with sapphire, ruby, emerald and diamonds 0.50ct

set of five rings 18k gold with sapphire, ruby, emerald and diamonds 0.50ct

Located in The Hague, ZH

oiled emerald total approx. 0.35 carat color green Clearance VS/SI - 4 x 2.5 mm carre heated ruby

Category

2010s Dutch Modern Cocktail Rings

Materials

Diamond, Emerald, Ruby, Sapphire, 18k Gold

Ring with ruby and marquise shaped diamond up to 0.38ct 18k gold 3.3 grams
Ring with ruby and marquise shaped diamond up to 0.38ct 18k gold 3.3 grams

Ring with ruby and marquise shaped diamond up to 0.38ct 18k gold 3.3 grams

Located in The Hague, ZH

facet-cut heated ruby, totaling approximately 1.24 carats Color: Red Clarity: VS/SI Gemstones are often

Category

2010s Dutch Modern Three-Stone Rings

Materials

Diamond, Ruby, 18k Gold

Necklace and pendant with ruby and brilliant cut diamonds up to 0.90ct 14k gold
Necklace and pendant with ruby and brilliant cut diamonds up to 0.90ct 14k gold

Necklace and pendant with ruby and brilliant cut diamonds up to 0.90ct 14k gold

Located in The Hague, ZH

x 4.4 mm x 2.3 mm marquise shape facet cut heated ruby ​​total approximately 0.50 carat color: blue

Category

2010s Dutch Modern Pendant Necklaces

Materials

Diamond, Ruby, 14k Gold

Brooch with pearl, ruby and old mine cut diamonds up to 0.80ct 18k gold/ silver
Brooch with pearl, ruby and old mine cut diamonds up to 0.80ct 18k gold/ silver

Brooch with pearl, ruby and old mine cut diamonds up to 0.80ct 18k gold/ silver

Located in The Hague, ZH

Clarity: …….. - 6 x 2.1 mm round facet-cut with a heated ruby, totaling approximately 0.30 carats Color

Category

Antique 1880s Dutch Early Victorian Brooches

Materials

Diamond, Pearl, Ruby, 18k Gold, Silver

Early Victorian 18k Gold Silver Ruby Diamond Cocktail Ring, Circa 1880
Early Victorian 18k Gold Silver Ruby Diamond Cocktail Ring, Circa 1880

Early Victorian 18k Gold Silver Ruby Diamond Cocktail Ring, Circa 1880

Located in The Hague, ZH

Set with - 4 x 4.0 mm round cabochon-cut heated ruby Color: Red Clarity: SI Gemstones are often

Category

Antique 1880s Dutch Early Victorian Cocktail Rings

Materials

Diamond, Ruby, 18k Gold, Silver

Bracelet with sapphire and brilliant cut diamonds up to 1.00ct 18k gold 19.7 gr
Bracelet with sapphire and brilliant cut diamonds up to 1.00ct 18k gold 19.7 gr

Bracelet with sapphire and brilliant cut diamonds up to 1.00ct 18k gold 19.7 gr

Located in The Hague, ZH

high Total weight: 19.7 grams Set with: - 72 x 3.2 mm round facet-cut heated ruby, totaling

Category

2010s Dutch Modern Modern Bracelets

Materials

Diamond, Sapphire, 18k Gold

Ring with sapphire, ruby, emerald and brilliant cut diamonds 18k yellow gold
Ring with sapphire, ruby, emerald and brilliant cut diamonds 18k yellow gold

Ring with sapphire, ruby, emerald and brilliant cut diamonds 18k yellow gold

Located in The Hague, ZH

mm oval cabochon-cut heated ruby, totaling approximately 0.40 carats Color: red Clarity: SI - 1 x

Category

2010s Dutch Modern Cocktail Rings

Materials

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

ART DECO STYLE 14k gold ring with ruby, old mine cut and silngle cut diamonds
ART DECO STYLE 14k gold ring with ruby, old mine cut and silngle cut diamonds

ART DECO STYLE 14k gold ring with ruby, old mine cut and silngle cut diamonds

Located in The Hague, ZH

pentagonal shape oil-heated ruby ​​total approx. 2.00 carats color : red clarity : SI Gemstones are often

Category

2010s Dutch Art Deco Cocktail Rings

Materials

Diamond, Ruby, 14k Gold

GIA Certified Natural Ruby and Marquise Diamond Ring in 14K Solid White Gold
GIA Certified Natural Ruby and Marquise Diamond Ring in 14K Solid White Gold

GIA Certified Natural Ruby and Marquise Diamond Ring in 14K Solid White Gold

Located in Hong Kong, HK

. Product Specifications: - 0.60ct 5mm High quality natural Round Cut Heated Ruby at the center - 6 Round

Category

2010s Hong Kong Modern Cluster Rings

Materials

Diamond, Ruby, White Gold

Pinkish Red Natural Ruby 1 Carat Oval Cut Loose Gemstone for Fine Jewelry Making
Pinkish Red Natural Ruby 1 Carat Oval Cut Loose Gemstone for Fine Jewelry Making

Pinkish Red Natural Ruby 1 Carat Oval Cut Loose Gemstone for Fine Jewelry Making

Located in Peshawar, PK

are admired for. Measuring 7.16 x 4.95 x 2.94 mm, this heated ruby is ideal for an engagement ring

Category

21st Century and Contemporary Mozambican Contemporary Loose Gemstones

Materials

Ruby

Pigeon Blood Oval Shape Ruby and Marquise Diamonds Engagement Ring Yellow Gold
Pigeon Blood Oval Shape Ruby and Marquise Diamonds Engagement Ring Yellow Gold

Pigeon Blood Oval Shape Ruby and Marquise Diamonds Engagement Ring Yellow Gold

Located in Hong Kong, HK

beauty with a modern touch. Product Specifications: - 2.00 High Quality Natural Oval Cut Heated Ruby

Category

2010s Hong Kong Art Deco Engagement Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Gubelin Certificate 5.18 Ct No heated Burma Ruby
Gubelin Certificate 5.18 Ct No heated Burma Ruby

Gubelin Certificate 5.18 Ct No heated Burma Ruby

Located in bangkok, TH

GG15: Gubelin Certificate Bumra ruby No heated Main Stone Weight: 5.18ct Name: Natural Ruby

Category

2010s Burmese Loose Gemstones

Materials

Ruby

6.10 Ct Pair No heated Burma Ruby Mogok mine
6.10 Ct Pair No heated Burma Ruby Mogok mine

6.10 Ct Pair No heated Burma Ruby Mogok mine

Located in bangkok, TH

GG17: 6.10ct Pair Unheated Burma ruby Mogok mine * commercial quality fine clarity nearly eye

Category

2010s Loose Gemstones

Materials

Ruby

6.57 Carat Non Heated Cabochon Star Ruby Diamond Engagement Ring
6.57 Carat Non Heated Cabochon Star Ruby Diamond Engagement Ring

6.57 Carat Non Heated Cabochon Star Ruby Diamond Engagement Ring

By Roshe Jewels

Located in Los Angeles, CA

6.57 Carat Non Heated Cabochon Star Ruby Diamond Engagement Ring Star Ruby Diamond Ring with a

Category

21st Century and Contemporary American Contemporary Wedding Rings

Materials

Diamond, Ruby, Star Ruby, 14k Gold, White Gold

Vintage 1.70Ct Thai Ruby and 1.68Ct Diamond Platinum Cocktail Ring 1975
Vintage 1.70Ct Thai Ruby and 1.68Ct Diamond Platinum Cocktail Ring 1975

Vintage 1.70Ct Thai Ruby and 1.68Ct Diamond Platinum Cocktail Ring 1975

Located in Jesmond, Newcastle Upon Tyne

heating; non-heated rubies are a scarcity. Images do not always reflect the true colour and brilliance of

Category

Vintage 1970s Cluster Rings

Materials

Diamond, Ruby, Platinum

Antique 3.00 Carat Burma Ruby and 1.02 Carat Diamond Yellow Gold Brooch
Antique 3.00 Carat Burma Ruby and 1.02 Carat Diamond Yellow Gold Brooch

Antique 3.00 Carat Burma Ruby and 1.02 Carat Diamond Yellow Gold Brooch

Located in Jesmond, Newcastle Upon Tyne

in Myanmar (Burma) and certifies that the gemstone shows no indications of heating; non-heated rubies

Category

Antique Early 1900s Unknown Brooches

Materials

Diamond, Ruby, 15k Gold, Yellow Gold

Vintage 1.70 Carat Thai Ruby Diamond White Gold Cluster Ring
Vintage 1.70 Carat Thai Ruby Diamond White Gold Cluster Ring

Vintage 1.70 Carat Thai Ruby Diamond White Gold Cluster Ring

Located in Jesmond, Newcastle Upon Tyne

gemstone shows no indications of heating; non-heated rubies are a scarcity. Images do not always reflect

Category

Vintage 1950s Unknown Cluster Rings

Materials

Diamond, Ruby, White Gold, Platinum

Pigeon Blood Ruby & Diamond Pendant Necklace in 18K White Gold IGI Certificate
Pigeon Blood Ruby & Diamond Pendant Necklace in 18K White Gold IGI Certificate

Pigeon Blood Ruby & Diamond Pendant Necklace in 18K White Gold IGI Certificate

Located in Viena, Viena

untreated (not heated) ruby ​​from Mozambique approx. 0.64 ct with GIL expertise, as a highlight a marquise

Category

2010s Italian Modern Pendant Necklaces

Materials

Diamond, Ruby, 18k Gold, White Gold

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Heated Ruby For Sale on 1stDibs

Surely you’ll find the exact heated ruby you’re seeking on 1stDibs — we’ve got a vast assortment 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. You can easily find a 3 antique edition and 17 modern creations to choose from as well. Making the right choice when shopping for a heated 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. For this particular piece, 1.5 Carat and 2 Carat are consistently popular carat weights. Creating a heated ruby has been a part of the legacy of many jewelers, but those produced by Héritage Jewelry, Harbor Diamonds and Amrapali are consistently popular. Take a look at a heated ruby featuring Ruby from our inventory today to add the perfect touch to your look. See these pages for an oval cut iteration of this accessory, while there are also round cut cut and baguette cut cut versions available here, too. Most of our heated ruby for sale are for women, but there are 11 pieces available to browse for men.

How Much is a Heated Ruby?

On average, a heated ruby at 1stDibs sells for $15,226, while they’re typically $1,700 on the low end and $88,440 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.