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Bochic “Orient” Natural African Ruby Diamond Ring Set 18K Yellow Gold &Silver
By Bochic
Located in New York, NY
Natural Rubies Round Brilliant- 1.00 Carat Bold, exotic, classic, vintage From the "Orient" traveling
Category

21st Century and Contemporary Thai Art Deco Solitaire Rings

Materials

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

14k White Gold Ruby Full Round Ring
By Emre Osmanlar
Located in ISTANBUL, TR
0,5 g 14k Gold 0,20 ct Ruby
Category

2010s Band Rings

Materials

Ruby, 14k Gold, White Gold

Charles Krypell 1.16ctw Round Diamonds 0.47ctw Round Ruby Drop Earrings
By Charles Krypell
Located in Houston, TX
These beautiful drop earrings from Charles Krypell feature 1.16 carat total weight in round
Category

21st Century and Contemporary American Drop Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

Round Ruby Diamond Ballerina Ring
Located in New York, NY
Ruby & Diamond Ballerina Ring, A ballerina ring with center oval ruby approximately 1.50 ct
Category

Vintage 1980s Cocktail Rings

Materials

Diamond, Ruby, 14k Gold

18K Yellow Gold Round Ruby Diamond Bracelet
By VR Jewels
Located in New York, NY
This Round Ruby Diamond Bracelet in 18K gold showcases 4.25 carats of endlessly sparkling natural
Category

21st Century and Contemporary American Modern Modern Bracelets

Materials

Diamond, Ruby, Yellow Gold, 18k Gold

18K Yellow Gold Round Ruby Diamond Bracelet
18K Yellow Gold Round Ruby Diamond Bracelet
$2,224 Sale Price / item
20% Off
Evil Eye Necklace with Diamond Single round Ruby
By Hand Made
Located in New York, NY
Evil Eye Material: 14K Yellow Gold Condition: New Ruby: .40ct Diamond: .75 Clarity: VS Color: G
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

Zelda Ring – Platinum with Natural Ruby Diamond Accents – 0.29 ct Round Ruby
Located in Greeneville, TN
beauty from Mountain Song Jeweler. 💕 This exquisite piece showcases a 0.29 carat natural round ruby
Category

Antique 15th Century and Earlier American Modern Fashion Rings

Materials

Diamond, Ruby, Platinum

Luxurious 0.03 ct. Round Ruby Nose Piercing
Located in רמת גן, IL
Product Details: Metal: 14k Yellow Gold Main stone: 1 pcs 0.03tcw Round natural Ruby Total carat
Category

2010s Israeli Stud Earrings

Materials

Ruby, Gold, 14k Gold, Yellow Gold

18K White Gold 1.53ct Demantoid Garnet Diamond Ring
By MOISEIKIN
Located in Hong Kong, HK
, 0.026 ct, 1.0 mm × 1.0 mm, 10 Diamond – Marquise, G, VS2, 0.63 ct, 4.0 mm × 2.0 mm, 1 Ruby – Round
Category

2010s Thai Contemporary Solitaire Rings

Materials

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

Luxurious 0.03 ct. Round Ruby Nose Piercing
Located in רמת גן, IL
Product Details: Metal: 14k Yellow Gold Main stone: 1 pcs 0.03tcw Round natural Ruby, colour
Category

2010s Israeli Stud Earrings

Materials

Ruby, Gold, Yellow Gold, 14k Gold

Silver Entourage Earrings with Round Ruby 20 White Sapphires
Located in Heemstede, NL
occasions. Material: silver Gemstone: synthetic ruby Cut: Round Carat: about 1 Gemstones: 20 round
Category

Vintage 1980s Dutch Stud Earrings

Materials

Ruby, Sapphire, Silver

Sterling Silver "Ram" Ring with a Ruby Eye, Containing 2 Round Ruby
By Gregory Mikaelian Sons, Inc.
Located in Los Angeles, CA
Sterling Silver "Ram" ring with a ruby eye, containing 2 round ruby weighing .30pts. ring size is 9
Category

21st Century and Contemporary American Artisan Fashion Rings

Materials

Ruby, Sterling Silver

Alternating Ruby and Round Diamond Eternity Band Ring
By GEMME
Located in New York, NY
8 Rubies weighing 2.52 Carats 8 Round Diamonds weighing 1.95 Carats. Set in Platinum. Size 6. Also
Category

2010s American Band Rings

Materials

Diamond, Ruby, Platinum

Yellow Gold Ruby Stud Earrings - 10k Round 1.40ctw Pierced
Located in Greensboro, NC
Metal Content: 10k Yellow Gold Stone Information Natural Ruby Treatment: Heating Carat(s
Category

21st Century and Contemporary Stud Earrings

Materials

Ruby, 10k Gold, Yellow Gold

18k Gold 3.75ctw Sapphire Tsavorite Diamond Open Quatrefoil Flower Link Bracelet
Located in Montclair, NJ
Brilliant Cut - Prong w/ Pave Set - Vivid Green Color - 0.60ctw (approx.) (22) Natural Genuine Ruby - Round
Category

21st Century and Contemporary Link Bracelets

Materials

Diamond, Ruby, Sapphire, Tsavorite, 18k Gold, Rose Gold, White Gold, Yel...

Designer Effy Ruby Studs in 18kt Rose Gold – 1.14ctw Round Rubies, Bezel Setting
By Effy
Located in West Hempstead, NY
18kt Rose Gold. Featuring 1.14 carat total weight (ctw) of vibrant round rubies in a sleek bezel
Category

21st Century and Contemporary Modern Stud Earrings

Materials

Ruby, 18k Gold, Rose Gold

Cushion Cut Ruby and Double Diamond Halo Cocktail Ring in 18 Karat Yellow Gold
Located in Scottsdale, AZ
gold setting, exuding warmth and luxury. Surrounding the vibrant ruby, round-cut diamonds form a
Category

21st Century and Contemporary Unknown Contemporary Cocktail Rings

Materials

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

Charles Krypell 1.03ctw Round Diamond 0.56ctw Round Ruby Regal Flower Ring
By Charles Krypell
Located in Houston, TX
0.56 carat total weight in round rubies set in 18 karat white gold. It is a floral shape and set on a
Category

21st Century and Contemporary American Cocktail Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

Finest 18k Gold GIA Aquamarine Sapphire Ruby Diamond Emerald Fancy Floral Brooch
Located in Montclair, NJ
Blue Colors - 3.60ctw (approx.) (10) Natural Genuine Rubies - Round & Oval Cut - Prong Set - Vibrant
Category

Early 2000s Unknown Brooches

Materials

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

1.12 Carat Natural Round Ruby Stud Earrings 14 Karat
Located in New York, NY
Victorian Stud 1.12ct. Round Natural Ruby earrings 4.5mm wide .9 grams. Natural, No
Category

2010s American Victorian Stud Earrings

Materials

Ruby, 14k Gold, Yellow Gold

Round Ruby Stud Earrings in 18K Yellow Gold
Located in London, GB
Handmade solitaire bright red round ruby stud earrings in 18k yellow gold. Simple and elegant with
Category

21st Century and Contemporary British Contemporary Stud Earrings

Materials

Ruby, 18k Gold, Yellow Gold

Burma Ruby and Round Diamond Rose Gold Ring
By H H Jewels
Located in Miami, FL
the H&H Collection. Size 6.75. Burma Ruby and Round Diamond Rose Gold Ring 18kt. Rose Gold 3.05ct
Category

2010s American Modern Cocktail Rings

Materials

Diamond, Ruby, Rose Gold

Handcrafted Ruby Ring with Brilliant Round Cut Diamond
By GEM PLAZA
Located in Jaipur, Rajasthan
Handcrafted Oval Ruby with brilliant round cut Diamond Ring Ruby - 2.51 CTS Brilliant round cut
Category

21st Century and Contemporary Indian Contemporary Cocktail Rings

Materials

Diamond, Ruby, 18k Gold

Yellow Gold Ruby Budded Cross Pendant 18k Round Faith
Located in Greensboro, NC
Metal Content: 18k Yellow Gold Stone Information Natural Rubies Treatment: Heating Carat(s): 2.56
Category

21st Century and Contemporary Pendant Necklaces

Materials

Ruby, 18k Gold, Yellow Gold

Vintage Round Ruby and Diamond Platinum Custer Stud Earrings
Located in London, GB
weight of approximately 1.00ct. Surrounding the diamond, six deep red round rubies are rubover set in an
Category

Vintage 1960s English Modern Stud Earrings

Materials

Diamond, White Diamond, Ruby, Platinum

Sterling Silver Horse Ring with a Ruby Eye, Containing 1 Round Ruby Weighing .04
By Gregory Mikaelian Sons, Inc.
Located in Los Angeles, CA
Sterling Silver horse ring with a ruby eye, containing 1 round ruby weighing .04pts. ring size is 6
Category

21st Century and Contemporary American Artisan Fashion Rings

Materials

Ruby, Sterling Silver

14K Yellow Gold Round Brilliant Ruby Ring 0.90ct
Located in Laguna Beach, CA
Ladies' diamond and ruby ring in 14k yellow gold setting. Tests 14k and weighs 8.7 grams gross
Category

21st Century and Contemporary Solitaire Rings

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

1.16ct Round Red Ruby GIA Certified Madagascar
Located in Toronto, Ontario
This is a stunning GIA Certified Ruby The GIA report reads as follows: GIA Report Number
Category

2010s Malagasy Loose Gemstones

Materials

Ruby

1.06ct Round Red Ruby GIA Certified Madagascar
Located in Toronto, Ontario
This is a stunning GIA Certified Ruby The GIA report reads as follows: GIA Report Number
Category

2010s Malagasy Loose Gemstones

Materials

Ruby

1.53ct Round Red Ruby GIA Certified Madagascar
Located in Toronto, Ontario
This is a stunning GIA Certified Ruby The GIA report reads as follows: GIA Report Number
Category

2010s Malagasy Loose Gemstones

Materials

Ruby

2.05 Carat Round Ruby and Round Brilliant Diamond 18k Yellow Feathered Brooch
Located in Chevy Chase, MD
Rubies with one round brilliant cut Diamond. The feathers have a beautiful brushed gold finish with
Category

Late 20th Century Retro Brooches

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Roberto Coin 18k Gold Fantasia Sapphire Diamond Wide Hinged Bangle Bracelet
By Roberto Coin
Located in Montclair, NJ
Dark Blue Color (1) Natural Genuine Ruby - Round Brilliant Cut - Pave Set - Red Color Diamond Carat
Category

21st Century and Contemporary Bangles

Materials

Diamond, Sapphire, 18k Gold, White Gold

7.46 Carat Ruby and Round Diamond Eternity Band Ring
By GEMME
Located in New York, NY
This beautiful Ring features 7 "Striking Red" Rubies alternating with 7 Round Brilliant Diamonds
Category

2010s American Band Rings

Materials

Diamond, Ruby, Platinum

GIA Certified 1.70Ct Round Brilliant Step Cut Natural Ruby
Located in San Diego, CA
This classic, custom designed ring features a beautiful deep red Round Brilliant Ruby with a GIA
Category

21st Century and Contemporary North American Contemporary Cocktail Rings

Materials

Ruby

Long Natural Round Ruby Tennis Necklace in 18K Yellow Gold with 8.54 Ct Rubies
By VR Jewels
Located in New York, NY
This elegant tennis necklace features round cut rubies totaling 8.54 carats, set in rich 18k yellow
Category

21st Century and Contemporary American Contemporary Choker Necklaces

Materials

Ruby, Gold, 18k Gold, Yellow Gold

7.94 Carat Ruby and Round Diamond Eternity Band Ring
By GEMME
Located in New York, NY
This beautiful Ring features 13 "Striking Red" Rubies with 1 Round Brilliant Diamond center
Category

2010s American Band Rings

Materials

Diamond, Ruby, Platinum

Mid-Century Round Ruby Diamond Spray Gold Brooch
Located in Stamford, CT
and white diamonds. 22 round rubies, certified by the GIA as natural, no heat. Accented by 5 round cut
Category

Mid-20th Century Brooches

Materials

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

Round Ruby Diamond Tennis Bracelet in 14K White Gold
Located in Old Tappan, NJ
14K white gold bracelet with round natural rubies weighing 4.08 carats total and natural diamonds
Category

2010s American Contemporary Tennis Bracelets

Materials

Diamond, Ruby, 14k Gold, White Gold

Round Ruby and Diamond Integral 14k Gold Cluster Necklace
Located in Miami, FL
14K yellow gold integral Ruby and Diamond necklace. This stunning gemstone cluster necklace has a
Category

Early 2000s Modern More Necklaces

Materials

Diamond, Ruby, 14k Gold

Yellow Gold Ruby Diamond Ring - 14k Round 1.00ctw
Located in Greensboro, NC
Gold Stone Information Natural Ruby Treatment: Heating Carat(s): .80ct Cut: Round Color: Pinkish Red
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

Yellow Gold Ruby Diamond Ring - 14k Round .89ctw
Located in Greensboro, NC
White Gold Stone Information Natural Ruby Treatment: Heating Carat(s): .34ct Cut: Round Color: Red
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Ruby, 14k Gold, White Gold, Yellow Gold

1.06 Ct GIA Round Diamond Round Emeralds Rubies Italian Flag Platinum Ring
By FERRUCCI
Located in New York, NY
Italian Flag Lover GIA Certified 1.06 Round diamond, G color, IF clarity, Internally Flawless with
Category

2010s American Art Nouveau Engagement Rings

Materials

Diamond, White Diamond, Emerald, Ruby, Platinum

25 carats Round Brilliant Cut Diamonds Rubies Bracelet
By Antinori Fine Jewels
Located in Chicago, IL
Diamonds, Tapered Baguette, and Round Cut Red Rubies in a floral design. The bracelet, weighing 53.8 grams
Category

2010s Italian Modern Tennis Bracelets

Materials

Diamond, White Diamond, Ruby, 14k Gold, Yellow Gold

18KT White Gold Round Cut Diamond and Ruby Ring
Located in New York, NY
18KT White Gold Round Cut Diamond and Ruby Band. This elegant band features 3.79 carats of vibrant
Category

2010s American Modern Fashion Rings

Materials

Diamond, Ruby, White Gold

Yellow Gold Ruby White Topaz Pendant - 10k Round 2.28ctw
Located in Greensboro, NC
Metal Content: 10k Yellow Gold & 10k White Gold Stone Information Natural Ruby Treatment: Heated
Category

21st Century and Contemporary Pendant Necklaces

Materials

Ruby, Topaz, 10k Gold, Yellow Gold

0.67ct Ruby Diamond Ring 14K Gold Round Brilliant Cut
Located in Sant Josep de sa Talaia, IB
handcrafted 14K gold ruby cluster ring, centered around a vivid 0.67ct natural ruby. With its intense red hue
Category

21st Century and Contemporary European Contemporary Cocktail Rings

Materials

Diamond, Ruby, 14k Gold

14K Yellow Gold Round Cut Ruby Diamond Ring
Located in Trumbull, CT
Hand cut and polished natural round ruby is crafted with hand in 14K yellow gold ring. Ideal for
Category

21st Century and Contemporary American Artisan Fashion Rings

Materials

Diamond, Ruby, Yellow Gold, 14k Gold

Yellow Gold Ruby Art Deco Lavaliere Pendant 14k Round Octagon
Located in Greensboro, NC
Era: Art Deco Metal Content: 14k Yellow Gold Stone Information Natural Ruby Treatment: Heating
Category

21st Century and Contemporary Pendant Necklaces

Materials

Ruby, 14k Gold, Yellow Gold

Sterling Silver Horse Ring with a Ruby Eye, Containing 1 Round Ruby Weighing .04
By Gregory Mikaelian Sons, Inc.
Located in Los Angeles, CA
Sterling Silver horse ring with a ruby eye, containing 1 round ruby weighing .04pts. ring size is 9
Category

21st Century and Contemporary American Artisan Fashion Rings

Materials

Ruby, Sterling Silver

14K Yellow Gold Round Cut Solitaire Ruby Ring
Located in Trumbull, CT
Hand cut and polished natural ruby ring is crafted with hand in 14K yellow gold thin band. Ideal
Category

21st Century and Contemporary American Artisan Solitaire Rings

Materials

Ruby, Yellow Gold, 14k Gold

2.20 Carat Round Ruby and Diamond Flower Stud Earrings
Located in New York, NY
A chic pair of stud earrings showcasing a vibrant ruby center surrounded by round brilliant
Category

21st Century and Contemporary American Contemporary Stud Earrings

Materials

Diamond, Ruby, Platinum

40.89 Carat Round Ruby and Diamond Halo Necklace
Located in New York, NY
An important piece of jewelry featuring 40.89 carats of vibrant round rubies, set in a brilliant
Category

21st Century and Contemporary American More Necklaces

Materials

Diamond, Ruby, 18k Gold, White Gold

GIA Certified .72ct Round diamond Ruby Band 14kt 12412
By Unbranded
Located in New York, NY
Diamonds: .40ct. H-color Vs-2 clarity. 1.16ct Natural Rubies (Heated). 14kt yellow gold 5.7 grams 5.4mm
Category

21st Century and Contemporary Neoclassical Engagement Rings

Materials

Diamond, Ruby, 14k Gold

Luxurious Yellow Gold Round Cut Diamonds and Baguette Cut Ruby Necklace
Located in New York, US
Exquisite 14K Yellow Gold Diamond & Ruby Necklace – 8.03 CTW Diamonds, 1 CTW Rubies, 16" Indulge
Category

2010s Drop Necklaces

Materials

Diamond, Ruby, Yellow Gold

0.77 Round Cut Ruby and Diamond Platinum Cluster Band Ring
Located in Miami, FL
Natural 0.77-carat round-cut ruby, beautifully complemented by 0.48 carats total weight of round
Category

21st Century and Contemporary Modern Cluster Rings

Materials

Diamond, Ruby, Platinum

Zydo 5.85ctw Round Diamond 0.41ctw Round Ruby 18k White Gold Stretch Band Ring
By ZYDO
Located in Houston, TX
round diamonds and 0.41 carat total weight in round rubies. It is comfortable and easy to slip on and
Category

21st Century and Contemporary Italian Band Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

3.85 Carat Round Ruby Diamond Yellow Gold Tennis Bracelet
Located in Stamford, CT
sophistication with timeless elegance. Set with 24 round, rich vibrant rubies that alternate with 24 round
Category

21st Century and Contemporary Tennis Bracelets

Materials

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

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Rubies Round For Sale on 1stDibs

You are likely to find exactly the rubies round 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 yellow gold — can elevate any look. Find an antique version now, or shop for 16486 vintage or 15784 modern creation for a more contemporary example of these cherished accessories. You’re likely to find the perfect rubies round among the distinctive items we have available, which includes versions made as long ago as the 18th Century as well as those produced as recently as the 21st Century. Finding an appealing rubies round — no matter the origin — is easy, but Roberto Coin, Tiffany Co. and Cartier each produced a popular version that is worth a look. A rubies round can make for a versatile accessory, but a selection from our variety of 22937 ruby versions can add an especially stylish touch. See these pages for a round cut iteration of this accessory, while there are also oval cut cut and brilliant cut cut versions available here, too. When shopping for a rubies round, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is a Rubies Round?

The price for a rubies round starts at $1 and tops out at $1,600,000 with these rings, on average, selling for $3,575.

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.