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Siam Ruby

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Siam Marquise Ruby Ring 2.95 Cts Heated C.Dunaigre Certified Unworn
Located in Geneva, CH
Intense Siam Marquise Ruby 2.95 carats ring unworn Mounted in an 18K White Gold ring The ring size
Category

2010s Swiss Art Deco Bridal Rings

Materials

White Diamond, Ruby, 18k Gold, White Gold

Andreoli Ruby Diamond Bypass CDC Certified Thailand 18 Karat White Gold Cocktail
By Andreoli
Located in New York, NY
Andreoli Ruby Diamond Bypass CDC Certified Thailand 18 Karat White Gold Cocktail. This ring
Category

21st Century and Contemporary Italian Contemporary Cocktail Rings

Materials

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

GIA Certified 2.00 ct. Oval Cut Thai Heated Ruby Estate Dome Cocktail Ring
Located in New York, NY
gorgeous 18 karat buttery gold setting, this 2.00 ct. oval cut Thai heated ruby, certified by GIA, sits
Category

Mid-20th Century Cocktail Rings

Materials

Ruby, 18k Gold

A multi Gem Set Gold Thai Princess Dome Ring
Located in London, GB
including nineteen Diamonds, Sapphire, Ruby, Moonstone, Garnet etc, eight in all. The inner shank stamped
Category

Vintage 1950s Thai Dome Rings

Materials

Diamond, Ruby, Sapphire, 14k Gold

2.49 Carat Conflict Free Oval Ruby GIA Certified from Thailand Set with Kites
By Leo Ingwer
Located in New York, NY
This stunning 2.49 Ct. GIA Certified Red Ruby is set in 14kt and 18kt with .50 ct. total weight of
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Ruby, 14k Gold, 18k Gold

Ruby Tennis Bracelet
Located in Briarcliff Manor, NY
Our gold ruby tennis bracelet is finally here. We couldn’t find the perfect ruby tennis bracelet at
Category

2010s Thai Tennis Bracelets

Materials

Ruby, 14k Gold, Yellow Gold

2.46 Carat Ruby Ring AGL Certified
Located in La Jolla, CA
Antique Thai No-heat Ruby Ring. Circa 1905, this antique ring features a stunning center ruby that
Category

20th Century Thai Cocktail Rings

Materials

Ruby

Unisex Ruby Adjustable Bead Bracelet with 3.84ct natural deep colour rubies
Located in Bangkok, TH
Total Weight: 19.76g Total Gemstone Weight: 3.84ct AAA natural rubies Bracelet Internal
Category

21st Century and Contemporary Thai Beaded Bracelets

Materials

Ruby, 18k Gold, White Gold

Neha Dani Ruby Pear Cabochon and Ruby Set with Diamonds, Roseate Earrings
By Neha Dani
Located in New York, NY
Round Brilliant Cut Diamonds and 3.17 Carat Rubies set on Natural Grey Titanium. Stunning 13.59 Carat
Category

21st Century and Contemporary Thai Contemporary More Earrings

Materials

Diamond, Ruby, Titanium

Impressive Yellow Gold, Ruby and Diamonds Pendant
Located in Bay Harbor Islands, FL
carved Ruby, natural no heat weighing 216.13cts., which is surrounded by eight Pear Shape Rose Cut
Category

Thai Choker Necklaces

Materials

Ruby, 18k Gold

Unheated Ruby Earrings, 18k White Gold, Unheated Rubies Diamond Earrings
Located in Bangkok, TH
Royal Ruby Collection Natural Drop Ruby and Diamond Earrings •• Earrings in 18K white gold
Category

2010s Thai Modern Drop Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

Gold and Ruby Wave Bangle
By Nancy Phillips
Located in Eugene, OR
18k Gold Wave shaped Bangle has 2.10cts of Rubies set on top. Shown here in a textured finish
Category

2010s Thai Modern Bangles

Materials

Ruby, Gold

Unheated Ruby Earrings, 18k White Gold, Unheated Rubies Diamond Earrings
Located in Bangkok, TH
Liberty Ruby Earrings • Earrings in 18K white gold. • Unheated rubies- 2 pc in drop cut - total
Category

2010s Thai Modern Clip-on Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

Ruby Diamond Solitaire Ring, Gemstone Stackable Ring with Natural Ruby
Located in New York, NY
Ruby with diamonds is the perfect combination for everyday! Whether it's raining, snowing, sunny
Category

21st Century and Contemporary Thai Modern Solitaire Rings

Materials

Diamond, Ruby, 14k Gold, Rose Gold

Invisible set flower ruby earrings
Located in Khet Bang Rak, Krung Thep Maha Nakhon
Floral design with Mystery set natural Ruby 20 mm size which are light weight & easy on ears. Made
Category

2010s Thai Artist Stud Earrings

Materials

Diamond, Ruby, 18k Gold

YI Collection Ruby Cluster Chain Ring
Located in New York, NY
the ever growing collection. A little cluster of brilliant cut Burmese rubies curve around the finger
Category

2010s Thai Modern Cluster Rings

Materials

Ruby, 14k Gold

YI Collection Ruby Chain Ring
Located in New York, NY
Our new Ruby chain ring in prong setting is our unbeatable best seller. It's comfortable to wear no
Category

2010s Thai Modern Fashion Rings

Materials

Ruby, 14k Gold

Cabochon Ruby White Gold Necklace
Located in New York, NY
13.79 carat Cabochon Rubies, with diamond halo, alternating with round diamonds, 1.44 carat total
Category

21st Century and Contemporary Thai Modern Link Necklaces

Materials

Diamond, Ruby, 18k Gold

Ruby Hoop Earrings in 18k Gold
By Nancy Phillips
Located in Eugene, OR
Over 7 carats of Rubies are in these classic 4.5cm in diameter hoop earrings. The earrings can
Category

2010s Thai Modern Hoop Earrings

Materials

Ruby, 18k Gold

Rubies Spinels Transformer Earrings, 18k White Gold Diamonds Rubies Spinels
Located in Bangkok, TH
• 18k White Gold. • Unheated Rubies in Cushion cut – 2 pc total carat weight – 1.19. • Spinels
Category

21st Century and Contemporary Thai Artisan Drop Earrings

Materials

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

Silver and Ruby Checker Band Ring
By Nancy Phillips
Located in Eugene, OR
+ carats of very nice rubies (worthy of setting in gold nice) used for the checker board patterned ring
Category

2010s Thai Modern Band Rings

Materials

Ruby, Silver

26.30 Carat Ruby White Gold Necklace
Located in New York, NY
Total Ruby weight: 26.30 carat Total Diamond weight: 4.51 carat Set in 18K Clasp: Tongue in box
Category

21st Century and Contemporary Thai Modern Drop Necklaces

Materials

Diamond, Ruby, 18k Gold

Silver Skeleton Earrings set with Ruby and Tourmaline
By Kary Adam
Located in Seattle, WA
Gold Plated Silver Skeleton Earrings set with Ruby and Tourmaline. These fun earrings are little
Category

2010s Thai Artisan Dangle Earrings

Materials

Ruby, Tourmaline, Silver

YI Collection Ruby Marquise Supreme Chain Ring
Located in New York, NY
This marquise Ruby is a magnificent shade of red. It is the supremely rare pigeon blood red color
Category

2010s Thai Modern Fashion Rings

Materials

Ruby, 18k Gold

Burmese Ruby Onyx Diamond Geometric Bracelet
By Treasure of Shahrazad
Located in Suriyawong Bangeak, TH
This solid 18 Carat White Gold Onyx Ruby and Diamond Bracelet. Extremely beautifully made with so
Category

2010s Thai Art Deco Retro Bracelets

Materials

Diamond, Ruby, 18k Gold

Natural Ruby and Diamond Drop Earrings
By Treasure of Shahrazad
Located in Suriyawong Bangeak, TH
with White Gold and Rose Gold bezel Set Marquise Cabochon and Oval Cabochon Natural Ruby perfect for a
Category

2010s Thai Art Deco Drop Earrings

Materials

Diamond, Ruby, 18k Gold

Geometric Double Ruby and Diamond Ring
By Treasure of Shahrazad
Located in Suriyawong Bangeak, TH
The ring consists of white gold and rose gold channel set fancy cut natural Burmese ruby's surround
Category

2010s Thai Art Deco More Rings

Materials

Diamond, Ruby, 18k Gold

Rubies Spinels Diamonds Earrings, 18k White Gold Unheated Rubies Spinels Er
Located in Bangkok, TH
• 18k White Gold. • Unheated Rubies in round cut – 6 pc total carat weight – 5.16. • Pink Spinels
Category

21st Century and Contemporary Thai Artisan Drop Earrings

Materials

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

Ruby Bangle in 18k White Gold
By Zahira Fine Jewellery
Located in Bangkok, TH
. The bangle is meticulously paved with vibrant rubies half way through the band. Their deep, rich hues
Category

Early 2000s Thai Modern Bangles

Materials

Ruby, 18k Gold, White Gold

Natural Un.Ruby Sapphire Ring, 18k White Gold Unheated Ruby Sapphires Ring
Located in Bangkok, TH
• 18k white gold. • Unheated Ruby in cushion cut – total carat weight 0.85. • Unheated sapphire
Category

21st Century and Contemporary Thai Modern Fashion Rings

Materials

Ruby, Sapphire, 18k Gold, White Gold

YI Collection Jade Ruby Globe Ring
Located in New York, NY
. The ruby band emphasize the white gemstone and gives it a modern twist. Not all jade is equal. This
Category

2010s Thai Modern Cocktail Rings

Materials

Jade, Ruby, 9k Gold

Ring with double halo of Ruby diamonds
Located in Khet Bang Rak, Krung Thep Maha Nakhon
size 6.59 x 6.55 x 4.41mm will be set by the client 2 separate halo color of rubies to be used along
Category

2010s Thai Art Deco Fashion Rings

Materials

Diamond, Ruby, 18k Gold

YI Collection Ruby Essentials Ring in 18k
Located in New York, NY
This stunning oval ruby is paired with a micro pave ruby band. It’s fire, clarity and color are
Category

2010s Thai Modern Solitaire Rings

Materials

Ruby, 18k Gold

YI Collection Lucky Ruby Bar Chain Ring
Located in New York, NY
this 14k bar are six spectacular rubies. Six is a lucky number which stands for flow in Chinese culture
Category

2010s Thai Modern Fashion Rings

Materials

Ruby, 14k Gold

Ruby and Diamond White Gold Pendant
Located in New York, NY
Ruby and diamond pendant set in 18K White Gold. Oval Ruby: 0.55 carat Round Diamonds: 0.31 carat
Category

21st Century and Contemporary Thai Modern Pendant Necklaces

Materials

Diamond, Ruby, 18k Gold

Unheated Ruby Sapphire Ring, 18k White Gold Ruby Sapphire Diamonds Ring
Located in Bangkok, TH
• 18 k white gold. • Unheated Ruby in cushion cut – total carat weight 0.9. • Unheated sapphire in
Category

21st Century and Contemporary Thai Neoclassical Engagement Rings

Materials

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

A Silver Nielloware Pendant set with Red Sapphire Ruby.
By Kary Adam
Located in Seattle, WA
This Lanna Style Pendant was created in a traditional Thai craft style called Nielloware. Using an
Category

2010s Thai Artist Pendant Necklaces

Materials

Ruby, Sapphire, Silver

18 Karat Gold and Ruby Hanging Earrings
By Nancy Phillips
Located in Eugene, OR
Simple yet elegant. The delicate, hanging earrings have 3.69cts of Rubies. The earrings are Light
Category

2010s Thai Modern Dangle Earrings

Materials

Ruby, 18k Gold

Emerald cut ruby eternity band in 18kt
Located in Khet Bang Rak, Krung Thep Maha Nakhon
Elevate your jewelry collection with this stunning emerald cut ruby eternity band, featuring 10.50
Category

2010s Thai Artisan Band Rings

Materials

Emerald, Ruby, Yellow Sapphire, 18k Gold

Vivid Red Ruby Diamond Swirl Dome Ring
By Treasure of Shahrazad
Located in Suriyawong Bangeak, TH
beautiful and perfectly French cut Rubies. Each Diamond and Ruby were superbly made and perfectly cut to
Category

2010s Thai Art Deco Dome Rings

Materials

Diamond, Ruby, 18k Gold

Vivid Ruby Diamond Double Halo Cocktail Ring
By Treasure of Shahrazad
Located in Suriyawong Bangeak, TH
carat vivid ruby with intense colour throughout the stone, Also to complement the ring it is surround by
Category

2010s Thai Art Deco Cluster Rings

Materials

Diamond, Ruby, 18k Gold

Burmese Ruby and Diamond Flower Cluster Ring
By Treasure of Shahrazad
Located in Suriyawong Bangeak, TH
ruby,s intricately cut to perfection. It features 2.25 carats of ruby,s followed by 0.30 carts of
Category

2010s Thai Art Deco Cluster Rings

Materials

Diamond, Ruby, 18k Gold

18 Karat Gold and Ruby Chain Necklace
By Nancy Phillips
Located in Eugene, OR
necklace down the front OR down the back. The teardrop ruby at the end of the necklace is the perfect
Category

2010s Thai Modern Chain Necklaces

Materials

Ruby, 18k Gold

14.8 Carat Ruby and Diamond Harp Earring
Located in Bangkok, TH
Burmese Rubies and 7.73 Carats of VS+ Diamonds.
Category

2010s Thai Modern Dangle Earrings

Materials

Diamond, Ruby, 18k Gold

6.90 Carat Ruby and Diamond Cocktail Ring
Located in Bangkok, TH
4.88 Carats of round and pear shaped rubies frame the 2.02 Carat Princess Diamond at the center of
Category

2010s Thai Modern Cocktail Rings

Materials

Diamond, Ruby, 18k Gold

8.5 CTS Natural Untreated Thai Sapphire Frog Ring .925 Sterling Silver Ring
Located in Los Angeles, CA
8.5 CTS Natural untreated Thailand Blue Sapphires and Natural Thailand glass filled rubies 3.5 CTS
Category

21st Century and Contemporary Modern More Rings

Materials

Ruby, Sapphire, Rhodium, Sterling Silver

GEMCOOK JEWELLERY 1.36ct Unheated Burma Mogok Pigeon Blood Ruby Ring
Located in Bangkok, TH
with GEMCOOK JEWELLERY's 1.36ct unheated Burmese Mogok Pigeon Blood Ruby Ring. Boasting a transparent
Category

2010s Thai Contemporary Solitaire Rings

Materials

Ruby

Blue Sapphire Red Ruby Diamond Pillow Ring
By Treasure of Shahrazad
Located in Suriyawong Bangeak, TH
Beautiful Blue Sapphire Red Ruby Diamond Ring mounted in 18kt white gold. The centre is blue
Category

2010s Thai Art Deco More Rings

Materials

Ruby, Blue Sapphire, 18k Gold

Natural Emerald Natural Ruby Diamond Dress Ring
By Treasure of Shahrazad
Located in Suriyawong Bangeak, TH
surrounded by Natural Burmese Ruby's. Zambian Emerald/Ruby weight: 2.27 Carats Diamond weight: 0.32 Carats
Category

2010s Thai Art Deco More Rings

Materials

Diamond, Emerald, Ruby, 18k Gold

Magnificent Color Diamonds and Ruby Cuff
By MIIORI
Located in New York, NY
, 13.52ct Heated Mozambique Rubies 2inches Wide, Size 18cm
Category

21st Century and Contemporary Thai Modern Cuff Bracelets

Materials

Diamond, Ruby, 18k Gold, Sterling Silver

Gold Snake Earrings with Black Diamond and Rubies
Located in ประเวศ, TH
Reveal your inner elegance with these beautiful earrings featuring Black Diamonds and Ruby in a
Category

2010s Thai Drop Earrings

Materials

Black Diamond, Ruby, Gold, 14k Gold

Burmese Moonstone Earrings with Cultured Orange Sapphire Ruby
By Kary Adam
Located in Seattle, WA
Kary Adam Designed, 18kt White Gold Burmese Moonstone Earrings with cultured Orange Sapphire & Ruby
Category

Early 2000s Thai Contemporary Stud Earrings

Materials

Moonstone, Ruby, Sapphire, 18k Gold

Diamond and Ruby Carved Wood Snake Ring
By Lotus Arts De Vivre
Located in Vail, CO
, and striking red ruby eyes. US size 6.5. *Ring cannot be sized
Category

21st Century and Contemporary Thai Artisan Fashion Rings

Materials

Diamond, Ruby, 18k Gold

1.39 Carat Oval Ruby Pyramid Shaped Mixed Diamonds Rubies 18 Karat Gold Ring
Located in Bangkok, TH
1.39 Carat Oval Ruby Pyramid Shaped 18 Karat Yellow Gold Ring set with Mixed Cut Diamonds and
Category

21st Century and Contemporary Thai Contemporary Dome Rings

Materials

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

Ruby and 18 Karat Rose Gold Ball Earrings
By Nancy Phillips
Located in Eugene, OR
Stunning Burmese rubies (12.96cts!) comprise these classic ball shaped earrings. The rubies are
Category

2010s Thai Contemporary Drop Earrings

Materials

Ruby, Rose Gold

29.36 Carat Ruby Necklace Set in 18 Karat
Located in New York, NY
Ruby: 29.36 carat Diamond weight: 9.50 carat Clasp: Tongue in box clasp with safety latch
Category

21st Century and Contemporary Thai Modern Drop Necklaces

Materials

Diamond, Ruby, 18k Gold

18kt white gold Invisible set butterfly Ruby diamond earrings
Located in Khet Bang Rak, Krung Thep Maha Nakhon
Invisible set ruby butterfly earrings are given form by precious ruby stones from East Africa and
Category

2010s Thai Artisan Stud Earrings

Materials

Ruby, Diamond, 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.