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Bochic “Capri” Ruby Multi Fancy Sapphire Ruby Bracelet Set In 18K Gold Siv
By Bochic
Located in New York, NY
Bochic “Capri” Ruby & Multi Color Sapphire & Ruby Bracelet Set In 18K Gold & Silver open and
Category

21st Century and Contemporary Thai Contemporary Modern Bracelets

Materials

Ruby, Sapphire, Blue Sapphire, 18k Gold, Silver

Bochic “Capri” Ruby Multi Fancy Sapphire Ruby Bracelet Set In 18K Gold Siv
By Bochic
Located in New York, NY
Bochic “Capri” Ruby & Multi Color Sapphire & Ruby Bracelet Set In 18K Gold & Silver open and
Category

21st Century and Contemporary Thai Contemporary Modern Bracelets

Materials

Ruby, Sapphire, Blue Sapphire, 18k Gold, Silver

Cabochon Ruby, Ruby with Diamond Earrings Set in 18 Karat White Gold Settings
Located in Bangkok, TH
Cabochon Ruby 4.84 carats, Ruby 1.10 carats with Diamond 0.75 carat Earrings set in 18 Karat White
Category

2010s Thai Contemporary Dangle Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

3 Ruby Oval Cabs Yellow Gold Diamonds 40 Carats Pear Shape Ruby Drops Earrings
By Tutti Frutti Jewellery
Located in Bangkok, TH
upper part of 3 oval shape Ruby cabs of 4 mm x 5 mm set together in 14 Kt yellow gold with 2 small
Category

2010s Thai Contemporary Stud Earrings

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

ARAYIAN 11.53 carats Invisibly Set Ruby Earrings
Located in Khet Bang Rak, 10
Gold: 3.77 grams Ruby: 11.53 carats A perfect pair of ruby earrings featuring exquisitely cut
Category

21st Century and Contemporary Thai Stud Earrings

Materials

Ruby, 18k Gold, White Gold

Ruby Ring set in Silver Settings
Located in Dusit, 10
Ruby Ring set in Silver Settings Width: 1.7 cm Length: 0.5 cm Ring Size: 53 Total Weight: 2.99
Category

2010s Thai Contemporary Band Rings

Materials

Ruby, Silver

Ruby Ring set in Silver Settings
Located in Dusit, 10
Ruby Ring set in Silver Settings Width: 1.8 cm Length: 1.1 cm Ring Size: 53 Total Weight: 4.25
Category

2010s Thai Contemporary Band Rings

Materials

Ruby, Silver

GIA Certified Natural Ruby Ring Diamonds 18 karat Yellow Gold Pear Shape Ruby
Located in Brooklyn, NY
GIA Certified Unheated Natural Ruby Ring. Ruby weight 3.53 carat, Pear Shape, some visible
Category

1990s Thai Cocktail Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

GIA Certified 3.0 Carat Burma Ruby Ring 18 Karat Yellow Gold, Oval Shape Ruby
Located in Brooklyn, NY
GIA Certified natural Burma 3.0 carat Ruby ring in 18K Yellow Gold, with side two round diamond
Category

1990s Thai Engagement Rings

Materials

Ruby, 18k Gold, Yellow Gold

Unheated Mozambique Ruby 2.35 carats certified by GUILD
Located in Khet Bang Rak, 10
Unheated 2.35 carats Mozambique pear shaped ruby, a perfect size for a engagement ring or a special
Category

21st Century and Contemporary Thai Modern Loose Gemstones

Materials

Ruby

Ruby 3.75 Carat, Ruby 1.29 Carat with Diamond 1.03cts Earrings in 18 Karat Gold
Located in Bangkok, TH
Centered with 1.29 carats and surrounded with 3.75 carats of Ruby and Diamond (1.03 carats), this
Category

2010s Thai Clip-on Earrings

Materials

Diamond, Ruby, Gold, 18k Gold, Rose Gold

Ruby, Brown Diamond, Blue Sapphire and Ruby Ring set in 18K Gold Settings
Located in Bangkok, TH
Ruby 4.41 carats, Brown Diamond 0.76 carat, Blue Sapphire 0.40 carat and Ruby 0.42 carat Ring set
Category

2010s Thai Contemporary Cocktail Rings

Materials

Brown Diamond, Ruby, Blue Sapphire, 18k Gold

Ruby with Diamond and Cabochon Ruby Ring Set in 18 Karat Gold Settings
Located in Bangkok, TH
Ruby 3.08 carats with Cabochon Ruby 0.75 carat and Diamond 0.61 carat Ring set in 18 Karat Gold
Category

2010s Thai Art Deco More Rings

Materials

Diamond, Ruby, 18k Gold, Gold

Ruby Ring set in 18K Gold Settings
Located in Bangkok, TH
Ruby 0.64 carat Ring set in 18K Gold Settings Width: 0.5 cm Length: 0.6 cm Ring Size: 54 Total
Category

2010s Thai Contemporary Solitaire Rings

Materials

Ruby, 18k Gold

Ruby Ring set in 18K Gold Settings
Located in Bangkok, TH
Ruby 0.43 carat Ring set in 18K Gold Settings Width: 0.5 cm Length: 0.3 cm Ring Size: 59 Total
Category

2010s Thai Contemporary Solitaire Rings

Materials

Ruby, 18k Gold

Ruby Ring set in 18K Gold Settings
Located in Bangkok, TH
Ruby 0.35 carat Ring set in 18K Gold Settings Width: 0.7 cm Length: 0.7 cm Ring Size: 49 Total
Category

2010s Thai Contemporary Cluster Rings

Materials

Ruby, 18k Gold

Ruby Ring set in 18K Gold Settings
Located in Bangkok, TH
Ruby 0.28 carat Ring set in 18K Gold Settings Width: 0.4 cm Length: 0.5 cm Ring Size: 49 Total
Category

2010s Thai Contemporary Solitaire Rings

Materials

Ruby, 18k Gold

Ruby Ring set in 18K Gold Settings
Located in Bangkok, TH
Ruby 0.34 carat Ring set in 18K Gold Settings Width: 0.6cm Length: 0.3 cm Ring Size: 60 Total
Category

2010s Thai Contemporary Solitaire Rings

Materials

Ruby, 18k Gold

Ruby Ring set in 18K Gold Settings
Located in Bangkok, TH
Ruby 0.58 carat Ring set in 18K Gold Settings Width: 1.0 cm Length: 0.5 cm Ring Size: 52 Total
Category

2010s Thai Contemporary Solitaire Rings

Materials

Ruby, 18k Gold

Cabochon Ruby with Ruby and Diamond Earrings Set in 18 Karat White Gold Settings
Located in Bangkok, TH
Cabochon Ruby 4.05 carat with Ruby 7.14 carats and Diamond 1.04 carats Earrings set in 18 Karat
Category

2010s Thai Art Nouveau Clip-on Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

13.36 Carat Burma Ruby And Diamond Earrings In Platinum
By Rewa Jewellery
Located in Bangkok, TH
An elegant Burmese ruby and diamond earrings showcased by Rewa jewels is handcrafted in platinum
Category

2010s Thai Modern Chandelier Earrings

Materials

Diamond, Ruby, Platinum

18KWG Ruby Diamond Floral Earrings by MOISEIKIN
By MOISEIKIN
Located in Hong Kong, HK
. This pair of earrings, made in 18K White gold, features 2.06ct vivid diamond-cut rubies and 0.5ct
Category

2010s Thai Contemporary Lever-Back Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

Ruby Earrings Set in 18 Karat Gold Settings
Located in Bangkok, TH
Ruby 4.34 carats Earrings set in 18 Karat Gold Settings Width: 1.8 cm Length: 2.2 cm Total
Category

2010s Thai Clip-on Earrings

Materials

Ruby, Gold, 18k Gold

Ruby Earrings Set in 18 Karat Gold Settings
Located in Bangkok, TH
Ruby 16.13 carats Earrings set in 18 Karat Gold Settings Width: 1.5 cm Length: 2.5 cm "Since we
Category

2010s Thai Clip-on Earrings

Materials

Ruby, Gold, 18k Gold

ARAYIAN 2.01-Carat Ruby Diamond Ring
Located in Khet Bang Rak, 10
Gold: 8.09 grams Ruby: 2.01 carats Diamond (round): 106 pieces – 1.79 carats AGL certified The
Category

21st Century and Contemporary Thai Modern Bridal Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

GIA Certified Unheated Cabochon Ruby with Ruby and Diamond Ring 18K Rose Gold
Located in Bangkok, TH
Cabochon Ruby 18.58 carats with Ruby 12.21 carats and Diamond 0.36 carat Ring set 18 Karat Rose
Category

2010s Thai Art Deco More Rings

Materials

Diamond, Ruby, 18k Gold, Rose Gold

Ruby Ring set in 18K Gold Settings
Located in Bangkok, TH
Ruby 4.92 carats Ring set in 18K Gold Settings Width: 2.0 cm Length: 1.5 cm Ring Size: 61 Total
Category

2010s Thai Baroque Revival Cocktail Rings

Materials

Ruby, 18k Gold

Ruby Star Pendant set in 18K Gold Settings
Located in Bangkok, TH
Ruby 0.47 carat Pendant set in 18K Gold Settings (chain not included) Width: 1.0 cm Length: 1.8
Category

2010s Thai Contemporary Pendant Necklaces

Materials

Ruby, 18k Gold

Classic 2.85 Carat Ruby Halo Diamond Ring
Located in Bangkok, TH
This captivating natural ruby and diamond ring showcases a vibrant 2.85-carat cushion-cut ruby
Category

2010s Thai Contemporary Cocktail Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

Cabochon Ruby, Ruby and Diamond Heart Ring set in 18K White/Rose Gold Settings
Located in Bangkok, TH
Cabochon Ruby 4.14 carats with Cabochon Ruby 0.48 carat, Ruby 0.28 carat and Diamond 0.31 carat
Category

2010s Thai Contemporary Cocktail Rings

Materials

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

Ruby Ring set in 14K Gold Settings
Located in Bangkok, TH
Ruby 0.78 carat Ring set in 14K Gold Settings Width: 0.9 cm Length: 0.9 cm Ring Size: 50 Total
Category

2010s Thai Art Deco Solitaire Rings

Materials

Ruby, 14k Gold

Ruby Ring set in 14K Gold Settings
Located in Bangkok, TH
Ruby 0.67 carat Ring set in 14K Gold Settings Width: 0.8 cm Length: 0.8 cm Ring Size: 56 Total
Category

2010s Thai Art Deco Solitaire Rings

Materials

Ruby, 14k Gold

Ruby Ring set in 14K Gold Settings
Located in Bangkok, TH
Ruby 0.53 carat Ring set in 14K Gold Settings Width: 0.7 cm Length: 0.7 cm Ring Size: 50 Total
Category

2010s Thai Art Deco Solitaire Rings

Materials

Ruby, 14k Gold

Ruby Ring set in 14K Gold Settings
Located in Bangkok, TH
Ruby 0.72 carat Ring set in 14K Gold Settings Width: 1.5 cm Length: 1.0 cm Ring Size: 52 Total
Category

2010s Thai Art Deco Solitaire Rings

Materials

Ruby, 14k Gold

Ruby Ring set in 14K Gold Settings
Located in Bangkok, TH
Ruby 0.40 carat Ring set in 14K Gold Settings Width: 1.0 cm Length: 1.0 cm Ring Size: 53 Total
Category

2010s Thai Art Deco Solitaire Rings

Materials

Ruby, 14k Gold

Ruby Elephant Necklace set in Silver Settings
Located in Dusit, 10
Ruby Necklace set in Silver Settings Width: 1.9 cm Length: 45.5 cm Total Weight: 3.48 grams
Category

2010s Thai Contemporary More Necklaces

Materials

Ruby, Silver

Diamond, Blue Sapphire Ruby Brooch
Located in New York, NY
Diamond, Blue Sapphire & Ruby Brooch in 18K White Gold Round Diamonds totaling 0.78ct - 94 stones
Category

2010s Thai Modern Brooches

Materials

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

1.49 Carat Burma Ruby No Heat Ruby And Diamond Ring In 18 Karat White Gold
By Rewa Jewellery
Located in Bangkok, TH
An elegant Burmese ruby and diamond ring showcased by Rewa jewels is handcrafted in 18 karat white
Category

2010s Thai Modern Cocktail Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

Cabochon Ruby Ring set in 18K Gold Settings
Located in Bangkok, TH
Cabochon Ruby 9.81 carats Ring set in 18K Gold Settings Width: 1.5 cm Length: 1.3 cm Ring Size
Category

2010s Thai Contemporary Cocktail Rings

Materials

Ruby, 18k Gold

Ruby Cufflinks Set in 18 Karat Gold Settings
Located in Bangkok, TH
Ruby 3.53 carats Cufflinks set in 18 Karat Gold Settings Width: 1.6 cm Length: 1.3 cm Total
Category

2010s Thai Contemporary Cufflinks

Materials

Ruby, Gold, 18k Gold

Ruby and Diamond Half Eternity Band
By Rewa Jewellery
Located in Bangkok, TH
A fine modern ruby and diamond ring, providing a subtle elegance with a personal flair; perfect
Category

2010s Thai Modern Band Rings

Materials

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

Ruby Pendant set in 18K White Gold Settings
Located in Bangkok, TH
Ruby 1.16 carats Pendant set in 18K White Gold Settings (chain not included) Width: 1.7 cm Length
Category

2010s Thai Contemporary Pendant Necklaces

Materials

Ruby, 18k Gold, White Gold

Ruby Bracelet set in 18 Karat Gold Settings
Located in Bangkok, TH
Ruby 13.78 carats Bracelet set in 18 Karat Gold Settings Width: 0.5 cm Length: 17.6 cm Total
Category

2010s Thai Contemporary Tennis Bracelets

Materials

Ruby, Gold, 18k Gold

Pearl, Ruby, Brown Diamond, Cabochon Ruby Brooch Set in 18 Karat White Gold Set
Located in Bangkok, TH
Pearl, Ruby 0.13 carat, Brown Diamond 1.17 carats, Cabochon Ruby 0.07 carat, Tsavorite 0.18 carat
Category

2010s Thai Contemporary Brooches

Materials

Brown Diamond, Pearl, Ruby, 18k Gold, White Gold

Cabochon Ruby Earrings set in 18K Gold Settings
Located in Bangkok, TH
Cabochon Ruby 3.05 carats Earrings set in 18K Gold Settings Width: 0.9 cm Length: 2.0 cm Total
Category

2010s Thai Contemporary Dangle Earrings

Materials

Ruby, 18k Gold

Ruby Necklace Set in 18 Karat Gold Settings
Located in Bangkok, TH
Ruby 3.60 carats Necklace set in 18 Karat Gold Settings Width: 6.0 cm Length: 46.0 cm Total
Category

2010s Thai Contemporary More Necklaces

Materials

Ruby, Gold, 18k Gold

Ruby Earrings Set in 18 Karat Gold Settings
Located in Bangkok, TH
Ruby 1.96 carats Earrings set in 18 Karat Gold Settings Width: 0.30 cm Length: 6.50 cm Total
Category

2010s Thai Contemporary Dangle Earrings

Materials

Ruby, Gold, 18k Gold

Cabochon Ruby with Ruby and Diamond Ring Set in 18 Karat White Gold Settings
Located in Bangkok, TH
Cabochon Ruby 2.16 carats with Ruby 3.57 carats and Diamond 0.57 carat Ring set in 18 Karat White
Category

Early 2000s Thai Art Nouveau More Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

Ruby Eternity Ring set in 18K Gold Settings
Located in Bangkok, TH
Ruby 6.55 carats Ring set in 18K Gold Settings Width: 2.3 cm Length: 0.4 cm Ring Size: 52 Total
Category

2010s Thai Contemporary Band Rings

Materials

Ruby, 18k Gold

Ruby with Diamond Earrings set in 18K Gold Settings
Located in Bangkok, TH
Ruby 1.45 carats with Diamond 0.38 carat Earrings set in 18K Gold Settings Width: 0.7 cm Length
Category

2010s Thai Contemporary Lever-Back Earrings

Materials

Diamond, Ruby, 18k Gold

Ruby with Diamond Bangle set in 18K Gold Settings
Located in Bangkok, TH
Ruby 7.69 carats with Diamond 0.24 carat Bangle set in 18K Gold Settings Width: 1.1 cm Diameter
Category

2010s Thai Contemporary Bangles

Materials

Diamond, Ruby, 18k Gold

Ruby with Diamond Bangle set in 18K Gold Settings
Located in Bangkok, TH
Ruby 9.02 carats with Diamond 1.21 carats Bangle set in 18K Gold Settings Width: 1.1 cm Diameter
Category

2010s Thai Contemporary Bangles

Materials

Diamond, Ruby, 18k Gold

Ruby with Diamond Bangle set in 18K Gold Settings
Located in Bangkok, TH
Ruby 6.06 carats with Diamond 0.80 carat Bangle set in 18K Gold Settings Width: 0.7 cm Diameter
Category

2010s Thai Contemporary Bangles

Materials

Diamond, Ruby, 18k Gold

ARAYIAN 2.07-Carat Ruby ring with Diamond
Located in Khet Bang Rak, 10
Gold - 4.79 grams Ruby - 2.07 carats Diamond (pear) 14 pieces - 1.12 carats Diamond (rounds) 24
Category

21st Century and Contemporary Thai Modern Engagement Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

Ruby Necklace Set in 18 Karat Gold Settings
Located in Bangkok, TH
Ruby 12.07 carats Necklace set in 18 Karat Gold Settings Width: 0.5 cm Length: 42.0cm Total
Category

2010s Thai Contemporary More Necklaces

Materials

Ruby, Gold, 18k Gold

Ruby Necklace Set in 18 Karat Gold Settings
Located in Bangkok, TH
Ruby 6.36 carats Necklace set in 18 Karat Gold Settings Width: 0.7 cm Length: 42.0 cm Total
Category

2010s Thai More Necklaces

Materials

Ruby, Gold, 18k Gold

Ruby Ring Set in 18 Karat Gold Settings
Located in Bangkok, TH
Ruby 0.86 carat Ring set in 18 Karat Gold Settings Width: 1.0 cm Length:0.9 cm Ring Size: 52
Category

2010s Thai More Rings

Materials

Ruby, Gold, 18k Gold

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Siam Ruby For Sale on 1stDibs

Find the exact siam ruby you’re shopping for in the variety available on 1stDibs. Each design created in this style — which was crafted with great care and often made from Gold, 18k Gold and Platinum — can elevate any look. You can easily find a 28 antique edition and 23 modern creations to choose from as well. Finding the perfect siam ruby may mean sifting through those created during different time periods — you can find an early version that dates to the 19th Century and a newer variation that were made as recently as the 21st Century. For this particular piece, 1 Carat and 1.5 Carat are consistently popular carat weights. Creating a siam ruby has been a part of the legacy of many jewelers, but those produced by Andreoli, Avanti and Berca Atelier are consistently popular. See these pages for an oval cut iteration of this accessory, while there are also cushion cut cut and round cut cut versions available here, too. Finding a siam ruby for sale for women should be easy, but there are 18 pieces available to browse for unisex as well as men, too.

How Much is a Siam Ruby?

Prices for a siam ruby can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $575 and can go as high as $300,116, while this accessory, on average, fetches $12,201.

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.