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20.91 Carat Burma No Heat Drop Shape Ruby and Diamond Brooch and Pendant
20.91 Carat Burma No Heat Drop Shape Ruby and Diamond Brooch and Pendant

20.91 Carat Burma No Heat Drop Shape Ruby and Diamond Brooch and Pendant

Located in New York, NY

A stunning 20.91 carat drop shape Ruby measuring 22.56 x 14.26 x 7.13 mm sprayed with mixed cut diamonds. The assortment of diamonds are aesthetically placed with alternating elevati...

Category

20th Century American Brooches

Materials

Diamond, Ruby, 18k Gold

AGL Certified 8 Carat No Heat Kashmir Sapphire, Burma Ruby, & Diamond Stack Ring
AGL Certified 8 Carat No Heat Kashmir Sapphire, Burma Ruby, & Diamond Stack Ring

AGL Certified 8 Carat No Heat Kashmir Sapphire, Burma Ruby, & Diamond Stack Ring

Located in Miami, FL

Details:  ✔ Item type: Detachable Stack ring ✔ Metal: 18k white and yellow gold ✔ Design: Toi Et Moi ✔ Size: US 6 (adjustable) ✔ Weight: 7.42 grams ✔ Setting: Prong, Channel Cent...

Category

21st Century and Contemporary Indian Art Nouveau Cocktail Rings

Materials

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

3.63-carat Natural Burma Mogok No Heat Vivid Red GRS Cushion Ruby Ring
3.63-carat Natural Burma Mogok No Heat Vivid Red GRS Cushion Ruby Ring

3.63-carat Natural Burma Mogok No Heat Vivid Red GRS Cushion Ruby Ring

By Antinori Fine Jewels

Located in Chicago, IL

The intricate placement of these diamonds not only adds a layer of sophistication but also accentuates the vibrant red hue of the central ruby. Crafted in 18K white gold, the settin...

Category

2010s Italian Modern Engagement Rings

Materials

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

3.29 Carat Burma No Heat Vivid Red Pigeon's Blood GRS Certified Ruby Ring
3.29 Carat Burma No Heat Vivid Red Pigeon's Blood GRS Certified Ruby Ring

3.29 Carat Burma No Heat Vivid Red Pigeon's Blood GRS Certified Ruby Ring

By Antinori Fine Jewels

Located in Chicago, IL

Introducing our exquisite 3.29-carat Burma No Heat Vivid Red Pigeon's Blood GRS Certified Ruby Ring!

Category

2010s Unknown Contemporary Engagement Rings

Materials

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

Amazing 8, 27 Carats of Burma Rubies and Diamonds on Earrings
Amazing 8, 27 Carats of Burma Rubies and Diamonds on Earrings

Amazing 8, 27 Carats of Burma Rubies and Diamonds on Earrings

Located in New Delhi, Delhi

So chic and elegant style for that earrings in 18k gold with two pieces of Burma rubies,fine quality, in cabochon cut of 5,95 carats, and diamonds in special cut of 2,32 carats,F/VS.

Category

21st Century and Contemporary Chandelier Earrings

Materials

18k 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

Two major US labs agree that this is a natural no heat gemstone! One sees it as a Ruby - Burma NO HEAT and one as a Pink Sapphire NO HEAT - The bottom line is this is a magnificent ...

Category

2010s American Engagement Rings

Materials

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

AIG Certified 102.00 Ct Untreated Zambia Emeralds Burma Rubies Sapphire Necklace
AIG Certified 102.00 Ct Untreated Zambia Emeralds Burma Rubies Sapphire Necklace

AIG Certified 102.00 Ct Untreated Zambia Emeralds Burma Rubies Sapphire Necklace

Located in New Delhi, Delhi

A master piece necklace , so magnificent , refined and chic style, for glamour ladies, by Italian designer, a very piece of art. Necklace come in 18k with 2 centre natural Untreate...

Category

21st Century and Contemporary Necklace Enhancers

Materials

18k Gold

DIANA M.  11.40ct Carat Burma Ruby Certified by GRS Sounded by 1cts of diamonds
DIANA M.  11.40ct Carat Burma Ruby Certified by GRS Sounded by 1cts of diamonds

DIANA M. 11.40ct Carat Burma Ruby Certified by GRS Sounded by 1cts of diamonds

By Diana M. Jewels

Located in New York, NY

18 karat yellow gold, ring showcases a stunning 11.40 carat Burma ruby at its center, certified by GRS. surrounded by this magnificent ruby are 1.00 carats of dazzling white diamond...

Category

21st Century and Contemporary American Modern Cocktail Rings

Materials

Diamond, Ruby, 18k Gold

AIG-GIT Certified South Sea Pearls 7.20 Ct Diamonds 6.20 Ct Burma Ruby Pendant
AIG-GIT Certified South Sea Pearls 7.20 Ct Diamonds 6.20 Ct Burma Ruby Pendant

AIG-GIT Certified South Sea Pearls 7.20 Ct Diamonds 6.20 Ct Burma Ruby Pendant

Located in New Delhi, Delhi

Magnificent pendant come in 18k gold with 5 pieces of lustrous South Sea Pearls of 13-14mm , high quality, spectacular pure white color, perfect shape and surface, and a centre Natur...

Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, South Sea Pearl, Ruby, 18k Gold

Pagoda Ring with Rare 1.80 ct Natural Burmese Ruby and 3 ct Diamond Double Halo
Pagoda Ring with Rare 1.80 ct Natural Burmese Ruby and 3 ct Diamond Double Halo

Pagoda Ring with Rare 1.80 ct Natural Burmese Ruby and 3 ct Diamond Double Halo

Located in Roma, IT

A striking Pagoda-style ring, centered with a rare natural Burmese ruby of 1.80 carats, displaying a vivid purplish-red hue of exceptional beauty. Surrounding the ruby is a magnifice...

Category

2010s Italian Contemporary Dome Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

Stunning Ct 8, 26 of Burma Ruby, Ceylon Sapphire, Colombia Emerald and Diamonds
Stunning Ct 8, 26 of Burma Ruby, Ceylon Sapphire, Colombia Emerald and Diamonds

Stunning Ct 8, 26 of Burma Ruby, Ceylon Sapphire, Colombia Emerald and Diamonds

Located in New Delhi, Delhi

Very amazing piece in 18k gold with Ceylon sapphire ct 3,51, ruby ct 2,08 oval cut , pear cut emerald ct 1,35 and diamonds round brilliant cut ct 1,32 F/VS-VVS. Handmade Jewels. To...

Category

21st Century and Contemporary Italian Contemporary Cocktail Rings

Materials

Diamond, Emerald, Ruby, Sapphire, 18k Gold

4.91 Carat Cabochon Natural Red Ruby Burma No Heat GIA and Diamond Platinum Ring
4.91 Carat Cabochon Natural Red Ruby Burma No Heat GIA and Diamond Platinum Ring

4.91 Carat Cabochon Natural Red Ruby Burma No Heat GIA and Diamond Platinum Ring

Located in Montreal, QC

Surrounded by a row of fine quality Brilliant Diamonds, weighing approx. 1.50tcw and outside of the Diamonds, approx. 2tcw of Rubies. Beautifully Hand crafted Platinum and 18K Gold m...

Category

Late 20th Century Modernist Cocktail Rings

Materials

Diamond, Ruby, 18k Gold, Platinum

1.72ct "Pigeons Blood" Oval Cut Ruby & Diamond Halo Ring
1.72ct "Pigeons Blood" Oval Cut Ruby & Diamond Halo Ring

1.72ct "Pigeons Blood" Oval Cut Ruby & Diamond Halo Ring

Located in Chicago, IL

This exquisite vintage-inspired engagement ring features a stunning, heated oval-cut natural Burma ruby weighing approximately 1.72 carats, showcasing a highly coveted vivid red colo...

Category

Vintage 1940s Burmese Modern Cocktail Rings

Materials

Diamond, Ruby, 18k Gold

Certified Red Spinel, Burma No Heat & Diamond Cocktail Ring 18 Karat Gold
Certified Red Spinel, Burma No Heat & Diamond Cocktail Ring 18 Karat Gold

Certified Red Spinel, Burma No Heat & Diamond Cocktail Ring 18 Karat Gold

By Emeralds Maravellous

Located in Brunswick, ME

Stunning and classic natural Burma No Heat Spinel cushion-cut vivid red weighing 2.21 carats GFCO certified. Accented by 6 baguette diamonds weighing 0.57ct, G in color, and VS in cl...

Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

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

AGL Certified 35 Carat Ruby and Diamond Statement Bracelet
AGL Certified 35 Carat Ruby and Diamond Statement Bracelet

AGL Certified 35 Carat Ruby and Diamond Statement Bracelet

Located in Beverly Hills, CA

One-of-a-kind, AGL-certified Burmese ruby and diamond wide tennis bracelet crafted in 18-karat white and 18-karat yellow gold. The 13 oval-shaped Burma rubies are AGL-certified and ...

Category

2010s Burmese Contemporary Tennis Bracelets

Materials

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

GIA Certified 4.38 Carat Ruby Three-Stone Cocktail Ring
GIA Certified 4.38 Carat Ruby Three-Stone Cocktail Ring

GIA Certified 4.38 Carat Ruby Three-Stone Cocktail Ring

Located in Beverly Hills, CA

Exquisit GIA certified 4.38 carat Burma No-Heat ruby three-stone diamond ring. This handcrafted three-stone ruby and diamond ring is meticulously set in platinum and 18k yellow gold.

Category

2010s Burmese Modern Three-Stone Rings

Materials

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

GIA Jade with Bat, Deer, and Peach Set with Ruby and Diamond Pendant
GIA Jade with Bat, Deer, and Peach Set with Ruby and Diamond Pendant

GIA Jade with Bat, Deer, and Peach Set with Ruby and Diamond Pendant

Located in Pasadena, CA

​This omphacite jade pendant is meticulously carved with motifs of a bat, deer, and peach, symbolizing happiness, prosperity, good fortune, and longevity. It features diamond accents...

Category

Vintage 1960s Burmese Artist Pendant Necklaces

Materials

Diamond, Jade, Ruby, 18k Gold

burma rubies white gold earring and diamond outline
burma rubies white gold earring and diamond outline

burma rubies white gold earring and diamond outline

Located in Montecatini Terme, IT

Pair of earrings in kt 18 white gold Italian manufacture central two Burmese rubies of ct 4.04 and brilliant-cut diamond outline for ct 2.00.

Category

Vintage 1980s Italian Modern Stud Earrings

Materials

Ruby, 18k Gold

Natural Red Ruby Stone 2.02 cts in 18KYG & Platinum Ring w Diamonds /GIA Reports
Natural Red Ruby Stone 2.02 cts in 18KYG & Platinum Ring w Diamonds /GIA Reports

Natural Red Ruby Stone 2.02 cts in 18KYG & Platinum Ring w Diamonds /GIA Reports

Located in Los Angeles, CA

Explore the 18K Yellow Gold and Platinum Ring featuring a 2.02 carats Natural Burma Ruby.

Category

21st Century and Contemporary Burmese Three-Stone Rings

Materials

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

GIA Certified Russian Emerald & Burma Sapphire White & Yellow Diamond  Joker Pin
GIA Certified Russian Emerald & Burma Sapphire White & Yellow Diamond  Joker Pin

GIA Certified Russian Emerald & Burma Sapphire White & Yellow Diamond Joker Pin

Located in New York, NY

GIA Certified Russian Emerald & Burma Sapphire White & Yellow Diamond Joker Pin GIA report # for Emerald is 5222519629 Natural beryl , Emerald Origin Russia GIA report # for Sapph...

Category

1990s Brooches

Materials

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

Unheated poppie red spinel from Mogok, Burma: 2,59ct. white brilliant-cut diamonds 0,1 ct., Rubies 0,14ct.

Category

2010s Belgian Contemporary Fashion Rings

Materials

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

Sculptural Vintage Inspired Ring with Precious Natural Gems
Sculptural Vintage Inspired Ring with Precious Natural Gems

Sculptural Vintage Inspired Ring with Precious Natural Gems

Located in Singapore, SG

This sculptural vintage-style ring is handcrafted in solid 18K gold and set with carefully curated natural precious gemstones, including a Burmese unheated ruby, Colombian emeralds, ...

Category

21st Century and Contemporary Singaporean Art Deco Cluster Rings

Materials

Diamond, Emerald, Ruby, 18k Gold

Burma Ruby Diamond Ring
Burma Ruby Diamond Ring

Burma Ruby Diamond Ring

Located in Sarasota, FL

AGL certified 7.98 carat cabochon Burma Ruby set in 18k mounting with 18 round brilliant and 10 tapered baguette diamonds weighing 5.11 carats, 9.89g

Category

21st Century and Contemporary More Rings

Materials

Diamond, Ruby, 18k Gold

Keith Davis 12.33 ct Burma Ruby Ring
Keith Davis 12.33 ct Burma Ruby Ring

Keith Davis 12.33 ct Burma Ruby Ring

By Keith Davis

Located in Sarasota, FL

Experience true luxury with the exquisite 18k ring handmade by Keith Davis. Adorned with a lustrous 12.33 carat cabochon Burma ruby and 2 sparkling round diamonds weighing 0.25 carat...

Category

2010s Fashion Rings

Materials

Diamond, Ruby, 18k Gold

A Victorian five stone Burmese ruby ring
A Victorian five stone Burmese ruby ring

A Victorian five stone Burmese ruby ring

Located in London, GB

This antique ring is in very good condition for its age. Unmarked, tested as 18ct gold. This incredible Victorian five stone Burmese ruby ring comes from the collection of Bentley &...

Category

Antique 1890s British Victorian Engagement Rings

Materials

Diamond, Ruby, 18k Gold

Victorian Five-Stone Burmese Ruby Ring
Victorian Five-Stone Burmese Ruby Ring

Victorian Five-Stone Burmese Ruby Ring

Located in London, GB

An impressive Victorian five stone ruby ring, consisting of five cushion-cut rubies graduating in size from the centre, the smaller ruby weighing 0.60 carat and the largest weighing ...

Category

Antique 1880s British Victorian Cluster Rings

Materials

Ruby, 18k Gold, Yellow Gold

Retro Style Burma Ruby and Diamond Bangle
Retro Style Burma Ruby and Diamond Bangle

Retro Style Burma Ruby and Diamond Bangle

Located in Sarasota, FL

18k Retro Style Bangle containing 11 Burma Rubies weighing approximately 1..25 carats and 9 round diamonds weighing 1.15 carats. 38.82g

Category

Mid-20th Century Bangles

Materials

Diamond, Ruby, 18k Gold

AGL Certified 1.29 Carat Burma Ruby and Diamond Halo Gold Milgrain Ring
AGL Certified 1.29 Carat Burma Ruby and Diamond Halo Gold Milgrain Ring

AGL Certified 1.29 Carat Burma Ruby and Diamond Halo Gold Milgrain Ring

By Diamond Stars Jewelry, Inc.

Located in New York, NY

Oval Halo Milgrain Engagement Ring The ring is 18K White Gold The oval Burma ruby is 1.29 Carats There are 0.75 Carats In Diamonds G/H SI The ring is AGL certified, see picture.

Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

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

Art Deco Style Burma Jade Buddha Gold Diamonds Rubies Red Enamel Dangle Earrings
Art Deco Style Burma Jade Buddha Gold Diamonds Rubies Red Enamel Dangle Earrings

Art Deco Style Burma Jade Buddha Gold Diamonds Rubies Red Enamel Dangle Earrings

By Tutti Frutti Jewellery

Located in Bangkok, TH

2 round Black Onix buttons tops with small round rubies cabochons in the center,central parts in white gold,small round rubies,14 round full cut diamonds,red enamel,and 2 Burma Jade ...

Category

Vintage 1980s Thai Art Deco Dangle Earrings

Materials

Diamond, Jade, Onyx, Ruby, 18k Gold, Gold, Enamel

Art Deco Style Burma Jade Gold Diamonds Rubies Emeralds Red Enamel Drop Earrings
Art Deco Style Burma Jade Gold Diamonds Rubies Emeralds Red Enamel Drop Earrings

Art Deco Style Burma Jade Gold Diamonds Rubies Emeralds Red Enamel Drop Earrings

By Tutti Frutti Jewellery

Located in Bangkok, TH

2 onix round buttons with small round emeralds in the center,middle parts with white gold small round ruby cabs ,16 round full cut diamonds,red enamel,2 Burma Jade plain drops Leng...

Category

Vintage 1980s Thai Art Deco Dangle Earrings

Materials

Diamond, Emerald, Jade, Ruby, Gold, Enamel, 18k Gold

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Burmese Ruby 18k Gold For Sale on 1stDibs

You are likely to find exactly the piece of burmese ruby 18k gold 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. Our collection of these items for sale includes 317 vintage editions and 424 modern creations to choose from as well. You’re likely to find the perfect item from our selection of burmese ruby 18k gold among the distinctive items we have available, which includes versions made as long ago as the 19th Century as well as those produced as recently as the 21st Century. As it relates to this specific piece, our collection includes designs that are universally popular, but 1 Carat and 1.5 Carat carat weights, specifically, are sought with frequency. Creating a choice in our collection of burmese ruby 18k gold has been a part of the legacy of many jewelers, but those produced by Andreoli, Royaal Stones Ltd and Tamir are consistently popular. 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 round cut alternatives. When shopping for an object in our assortment of burmese ruby 18k gold, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is a Burmese Ruby 18k Gold?

On average, a piece of burmese ruby 18k gold at 1stDibs sells for $15,487, while they’re typically $650 on the low end and $1,575,000 for the highest priced versions of this item.

Why Gold Shines in Jewelry Craftsmanship

Gold is the feel-good metal, the serotonin of jewelry. Wear vintage and antique gold necklaces, watches, gold bracelets or gold rings and you feel happy, you feel dressed, you feel, well, yourself. 

Gold, especially yellow gold, with its rich patina and ancient pedigree going back thousands of years, is the steady standby, the well-mannered metal of choice. Any discussion of this lustrous metal comes down to a basic truth: Gold is elementary, my dear. Gold jewelry that couples the mystique of the metal with superb design and craftsmanship achieves the status of an enduring classic. Many luxury houses have given us some of our most treasured and lasting examples of gold jewelry over the years.

Since its founding, in 1837, Tiffany & Co. has built its reputation on its company jewelry as well as its coterie of boutique designers, which has included Jean Schlumberger, Donald Claflin, Angela Cummings and Elsa Peretti. There are numerous gold Tiffany classics worth citing. Some are accented with gemstones, but all stand out for their design and the workmanship displayed.

For the woman who prefers a minimalist look, the Tiffany & Co. twist bangle (thin, slightly ovoid) is stylishly simple. For Cummings devotees, signature pieces feature hard stone inlay, such as her pairs of gold ear clips inlaid with black jade (a play on the classic Chanel black and tan), or bangles whose design recalls ocean waves, with undulating lines of lapis lazuli and mother-of-pearl. And just about any design by the great Jean Schlumberger is by definition a classic.

Even had he eschewed stones and diamonds, Southern-born David Webb would be hailed for the vast arsenal of heavy gold jewelry he designed. Gold, usually hammered or textured in some manner, defines great David Webb jewelry. The self-taught jeweler made very au courant pieces while drawing inspiration from ancient and out-of-the-way sources — East meets West in the commanding gold necklaces made by Webb in the early 1970s. The same could be said for his endlessly varied gold cuffs.

In Europe, many houses have given us gold jewelry that sets the highest standard for excellence, pieces that were highly sought after when they were made and continue to be so. 

Numerous designs from Cartier are homages to gold. There are the classic Trinity rings, necklaces and bracelets — trifectas of yellow, white and rose gold. As a testament to the power of love, consider the endurance of the Cartier Love bracelet.

Aldo Cipullo, Cartier’s top in-house designer from the late 1960s into the early ’70s, made history in 1969 with the Love bracelet. Cipullo frequently said that the Love bracelet was born of a sleepless night contemplating a love affair gone wrong and his realization that “the only remnants he possessed of the romance were memories.” He distilled the urge to keep a loved one close into a slim 18-karat gold bangle. 

BVLGARI and its coin jewelry, gemme nummarie, hit the jackpot when the line launched in the 1960s. The line has been perennially popular. BVLGARI coin jewelry features ancient Greek and Roman coins embedded in striking gold mounts, usually hung on thick link necklaces of varying lengths. In the 1970s, BVLGARI introduced the Tubogas line, most often made in yellow gold. The Tubogas watches are classics, and then there is the Serpenti, the house's outstanding snake-themed watches and bracelets.

A collection called Monete that incorporated the gold coins is one of several iconic BVLGARI lines that debuted in the 1970s and ’80s, catering to a new generation of empowered women. Just as designers like Halston and Yves Saint Laurent were popularizing fuss-free ready-to-wear fashion for women on the go, BVLGARI offered jewels to be lived in

Since Van Cleef & Arpels opened its Place Vendôme doors in 1906, collection after collection of jewelry classics have enchanted the public. As predominantly expressed in a honeycomb of gold, there is the Ludo watch and accessories, circa the 1920s, and the golden Zip necklace, 1951, whose ingenious transformation of the traditional zipper was originally proposed by the Duchess of Windsor. Van Cleef's Alhambra, with its Moroccan motif, was introduced in 1968 and from the start its popularity pivoted on royalty and celebrity status. It remains one of VCA’s most popular and collected styles.

Mention must be made of Buccellati, whose name is synonymous with gold so finely spun that it suggests tapestry. The house’s many gold bracelets, typically embellished with a few or many diamonds, signified taste and distinction and are always in favor on the secondary market. Other important mid-20th-century houses known for their gold-themed jewelry include Hermès and Ilias Lalaounis.

Find a stunning collection of vintage and antique gold jewelry on 1stDibs.

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.