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Ruby Watches

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Retro Cartier Diamond Ruby Watch
Located in Beverly Hills, CA
Retro Cartier Diamond Ruby Watch. Featuring 5 Old European Cut diamonds approximately 0.25 carat total, D-E color, VS clarity. With 4 square ruby highlights approximately 1.20 carat ...
Category

1940s Retro Vintage Ruby Watches

Materials

Diamond, Ruby, 14k Gold, Rose Gold

Automatic Wristwatch White Gold White Diamonds Ruby Hand Decorated Micromosaic
Located in London, GB
Micro Mosaic artists tiny handwoven Venetian enamel rods obtained from the high temperature melting of nine base colors with diamond dust, realizing endless combinations of tones and...
Category

21st Century and Contemporary Contemporary Ruby Watches

Materials

Ruby, White Diamond, 18k Gold, White Gold

Watch White Gold White Diamonds Sapphires Ruby Satin Strap Decorated Micromosaic
Located in London, GB
Micro Mosaic artists tiny handwoven Venetian enamel rods obtained from the high temperature melting of nine base colors with diamond dust, realizing endless combinations of tones and...
Category

21st Century and Contemporary Contemporary Ruby Watches

Materials

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

Watch Gold White and Black Diamonds Ruby Satin Strap Hand Decorated Micromosaic
Located in London, GB
Micro Mosaic artists tiny handwoven Venetian enamel rods obtained from the high temperature melting of nine base colors with diamond dust, realizing endless combinations of tones and...
Category

21st Century and Contemporary Contemporary Ruby Watches

Materials

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

Stylish Watch Gold Ruby Alligator and Fur Strap Hand Decorated with Micro Mosaic
Located in London, GB
Micro Mosaic artists tiny handwoven Venetian enamel rods obtained from the high temperature melting of nine base colors with diamond dust, realizing endless combinations of tones and...
Category

21st Century and Contemporary Modern Ruby Watches

Materials

Ruby, Gold, 18k Gold

Watch Yellow Gold Sapphires Ruby Lizard Strap Handdecorated with MicroMosaic
Located in London, GB
Micro Mosaic artists tiny handwoven Venetian enamel rods obtained from the high temperature melting of nine base colors with diamond dust, realizing endless combinations of tones and...
Category

21st Century and Contemporary Modern Ruby Watches

Materials

Ruby, Sapphire, Yellow Gold, 18k Gold

Automatic Wristwatch White Gold White & Black Diamond Ruby Ice Diamond
Located in London, GB
Micro Mosaic artists tiny handwoven Venetian enamel rods obtained from the high temperature melting of nine base colors with diamond dust, realizing endless combinations of tones and...
Category

21st Century and Contemporary Contemporary Ruby Watches

Materials

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

Watch Automatic White Gold White Diamonds Ruby Alligator Strap Micro Mosaic
Located in London, GB
Micro Mosaic artists tiny handwoven Venetian enamel rods obtained from the high temperature melting of nine base colors with diamond dust, realizing endless combinations of tones and...
Category

21st Century and Contemporary Contemporary Ruby Watches

Materials

White Diamond, Ruby, 18k Gold, White Gold

Watch Gold White Diamonds Ruby Satin Strap Handdecorated with Micromosaic
Located in London, GB
Micro Mosaic artists tiny handwoven Venetian enamel rods obtained from the high temperature melting of nine base colors with diamond dust, realizing endless combinations of tones and...
Category

21st Century and Contemporary Contemporary Ruby Watches

Materials

White Diamond, Ruby, Gold, 18k Gold

Automatic Watch White Gold White Diamonds Sapphires Ruby Alligator Strap
Located in London, GB
Micro Mosaic artists tiny handwoven Venetian enamel rods obtained from the high temperature melting of nine base colors with diamond dust, realizing endless combinations of tones and...
Category

21st Century and Contemporary Contemporary Ruby Watches

Materials

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

Universal Genève Lady Jewelry Bracelet Watch 18 Carat Yellow Gold and Rubies
Located in Milan, IT
Particular jewel watch signed Universal Genève in 18kt yellow gold and ruby pave details. The tilting handle is transformed into a jewel detail that gives a stylish note to the objec...
Category

1950s Vintage Ruby Watches

Materials

Ruby, 18k Gold, Yellow Gold

Lady's Ruby Sapphire Amethyst Moonstone Gold Wristwatch circa 1950s
Located in Stamford, CT
Mid-Century Lady's 14k yellow gold watch with a halo of natural stones, ruby, sapphire, amethyst and moonstone, with a 17-jewel manual-wind movement and solid gold mesh Kreisler brac...
Category

Mid-20th Century Ruby Watches

Materials

Amethyst, Moonstone, Ruby, Sapphire, 14k Gold, Yellow Gold, Gold

Perpetual Calendar Jump Date Pocket Watch by Marius LeCoultre
Located in New Orleans, LA
Created by the famed Swiss watchmaker firm Marius LeCoultre, this perpetual calendar chronograph pocket watch features a beautifully crafted 18K rose gold case decorated in a foliate...
Category

Late 19th Century Aesthetic Movement Antique Ruby Watches

Materials

Ruby, 18k Gold, Rose Gold

Exquisite Hunter-Case Swiss Pocket Gold Watch Courvoisier, 1870
Located in Bilbao, ES
Exquisite Gold hunter-case Swiss pocket watch COURVOISIER #10673. Golden case with three 43mm/1.69in extrathin lids showing a beautiful dècor of a peasant with a pitcher by a well an...
Category

Late 19th Century Antique Ruby Watches

Materials

Ruby, Gold

XIX Century Open-Face Gold Pocket Watch R. Stewart
Located in Bilbao, ES
XIX Century Open-face Gold Pocket Watch R. STEWART, Argyle & Buchanan Sts., Glasgow, #16044. Beautiful 43m/1.69in gold case with a thorough ornamental floral engraving with vegetatio...
Category

Late 19th Century Antique Ruby Watches

Materials

Ruby, Gold

18k Rose Gold Hunter-Case Swiss Pocket Watch Angelus
Located in Bilbao, ES
18K Rose Gold Hunter-case Swiss Pocket Watch ANGELUS #40283. Cronograph with o'clock and quarter chimes on demand. 58mm/2.28in three-lid case in rose gold. External lids in guillochè...
Category

Late 19th Century Antique Ruby Watches

Materials

Ruby, Rose Gold

XIX Century Open-Face Brittish Gold Pocket Watch F. Brooman
Located in Bilbao, ES
Great "open-face" Brittish pocket watch F. BROOMAN, Strand, London, N#614. Solid gold case, gold sphere, external and internal cases are plain. Roman numerals, rubys. Mint working c...
Category

Late 19th Century Antique Ruby Watches

Materials

Ruby, Gold, 18k Gold, Yellow Gold

18K Yellow Gold Hunter-Case Swiss Pocket Watch 1880 Guye aux Perrieres
Located in Bilbao, ES
18K yellow gold Hunter-case Swiss pocket watch with three strong lids, external ones in guillochè. Silver guillochè sphere with gold Roman numerals and blue hands. Seconds hands at s...
Category

Late 19th Century Antique Ruby Watches

Materials

Ruby, 18k Gold, Yellow Gold

Extreme Art Deco Ruby and Diamond Watch Circa 1920 - 1930 in Platinum
Located in Wailea, HI
Extreme Art Deco Ruby and Diamond Watch Circa 1920 - 1930 in Platinum Eight Baguette Burmese Rubies Weighing 1.00 Carats Approximately [bright with no imperfections visible to the ...
Category

Early 20th Century Art Deco Ruby Watches

Materials

Diamond, Ruby, Platinum

Rolex GMT-Master II 0 16718 Men Yellow Gold Serti Dial Watch
Located in Bishops Stortford, Hertfordshire
"Xupes Reference: COM002910 Manufacturer: Rolex Model: GMT-Master II Model Variant: 0 Model Number: 16718 Age: 24-09-2005 Gender: Men Complete With: Rolex Box, Manuals, Swing tags, G...
Category

Early 2000s Ruby Watches

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Maestro Limited Edition Watch by Christophe Claret
Located in New Orleans, LA
This wristwatch by Christophe Claret is part of the limited edition Maestro collection, and it displays a plethora of novel complications upon a playfully modern face. A large conica...
Category

20th Century Modern Ruby Watches

Materials

Ruby, Gold, Titanium

Vintage Retro Equestrian Theme Ruby and Diamond Ladies Watch
Located in Stamford, CT
Following the equestrian motif similar to that of Cartier and Hermes, and various jewelers around the world, this watch is the epitome of feminine refinement. The double snake chain ...
Category

1940s Retro Vintage Ruby Watches

Materials

Diamond, Ruby, 14k Gold

Ruby and 14 Karat Yellow Gold Locket, 7.00 Carat
Located in New Orleans, LA
This delicate-yet-stunning locket is adorned by approximately 240 dazzling red ruby cabochons. Crafted of 14K yellow gold, the gorgeous rubies encrusting this locket weigh approximat...
Category

21st Century and Contemporary Modern Ruby Watches

Materials

Ruby, 14k Gold, Yellow Gold

1.56 Carat Ruby 1.02 Carat Diamond Ladies Cocktail Watch in White Gold Art Deco
Located in Jesmond, Newcastle Upon Tyne
A stunning, fine and impressive vintage Art Deco 1.56 carat ruby and 1.02 carat diamond ladies cocktail watch crafted in 9k white gold; part of our vintage watch collection. This st...
Category

1940s Art Deco Vintage Ruby Watches

Materials

Diamond, Ruby, 9k Gold, White Gold

Bulgari "Catene" 18k White Gold and Diamond Bracelet Bvlgari Wristwatch
Located in Miami, FL
Original Bulgari Swiss-made CATENE watch with 18k white gold gourmette (link) strap. An extravagant timepiece in mint condition. A perfectly finished Cuban-style link bracelet wraps ...
Category

Early 2000s Ruby Watches

Materials

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

Rolex Yacht-Master Ruby Mother of Pearl Dial Watch 16628
Located in Southampton, PA
The Rolex Yacht-Master Chronometer Watch, reference number 16628, is an impeccably crafted luxury piece. Elegantly accented by shimmering gemstones, this timepiece’s dial is unlike a...
Category

21st Century and Contemporary Ruby Watches

Materials

Pearl, Ruby, 18k Gold, Yellow Gold

Piaget 4925D2 18k Yellow Gold Diamond & Ruby Ladies Watch
Located in Boca Raton, FL
Brand: Piaget Case Material: 18k Yellow Gold Case Diameter: 21mm Crystal: Sapphire Crystal Bezel: 18k Yellow gold Ruby & Diamond bezel Dial: Gold & Ruby dial with yellow gold hands B...
Category

Late 20th Century Ruby Watches

Materials

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

Rare Piaget Ruby Dial Diamond 18 Karat Gold Mechanical Wristwatch
Located in New York, NY
Piaget mechanical wristwatches from the 1970s have long become a collector item, besides being a beautiful piece of wearable jewelry. Among these the most sought after models are the...
Category

1970s Vintage Ruby Watches

Materials

Diamond, Ruby, 18k Gold

Retro Ladies Diamond Sugar Loaf Ruby Yellow Gold Bracelet Watch
Located in Napoli, Italy
Unusual and sophisticated vintage lady's bracelet watch with a pave diamond setting central concealed "Movado" watch set on a 18k yellow gold mounting. The watch is functioning, the ...
Category

Mid-20th Century Retro Ruby Watches

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Omega Vintage Platinum Diamonds and Rubies Ladies Mechanical Wrist Watch
Located in Chicago, IL
Circa 1950 Omega Ladies Wrist watch, the top including the 4 rows of stones on each side measures 30 X 13 M.M. A 2 piece Platinum signed Omega case set with Diamonds totaling .60 Car...
Category

1950s Vintage Ruby Watches

Materials

Diamond, Ruby, 14k Gold, Platinum

Pre-Owned Lucien Picard Ruby and Diamond Vintage Watch 1940'S 14k Yellow Gold
Located in Carmel-by-the-Sea, CA
Estate diamond & ruby Lucien Picard vintage timepiece in 14 karat yellow gold. Mechanical 17 jewel movement in working order. Single cut diamonds and round faceted rubies. The case ...
Category

20th Century Ruby Watches

Materials

Diamond, Ruby, Yellow Gold

Roger Dubuis Too Much Limited Edition Diamond Ruby 18k Gold Watch
Located in Miami, FL
Limited Edition Roger Dubuis Too Much Collection With 18k white gold, Original Factory Set Natural Diamonds. Diamond Bezel, Black Dial with Mother of Pearl, and Genuine Rubies. Origi...
Category

21st Century and Contemporary Modern Ruby Watches

Materials

Diamond, Ruby, 18k Gold

Piaget Dress Watch Women's 18k Yellow Gold Champagne Dial Ruby & Diamond Set
Located in London, GB
A 25 mm 18kYellow Gold Women's Dress Wristwatch, champagne dial with Roman numerals, a fixed 18k yellow gold bezel set with 20round brilliant-cut rubies and 4 round brilliant cut dia...
Category

21st Century and Contemporary Ruby Watches

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Ebel Discovery Wristwatch 883830, Diamonds and Rubies 18 Karat Gold Bracelet
By Ebel
Located in Antwerp, BE
EBEL. AN 18K GOLD DIAMOND AND RUBIES CENTER SECONDS BRACELET WATCH WITH ROTATING BEZEL Discovery, 883830 Quartz movement, circular cream dial with raised roman chapters and round di...
Category

21st Century and Contemporary Artisan Ruby Watches

Materials

Diamond, Ruby, Gold

Piaget Fully Loaded Diamond and Ruby Set Quartz Vintage Wristwatch
Located in London, GB
An 18k Yellow Gold Fully Loaded Vintage Ladies Wristwatch, pave diamond dial set with 2 round brilliant cut rubies at 3, 6, 9 and 12 0'clock, a fixed 18k yellow gold bezel set with 2...
Category

21st Century and Contemporary Ruby Watches

Materials

Diamond, Ruby, Yellow Gold

Rolex Ladies Ruby Diamond Rose Gold Covered Wristwatch
Located in Stamford, CT
Vintage 1950's ladies Rolex covered watch with bright red genuine rubies and sparkly full cut diamonds in 18k rose gold. The Rolex case movement, dial and crown were fitted to the cu...
Category

Mid-20th Century Ruby Watches

Materials

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

Rolex President Yellow Gold Diamond Rubies Watch 69068 Box Papers
Located in New York, NY
All original Pre-owned Rolex Lady President 26mm in 18K Yellow Gold, excellent conditions. 18K Gold, President bracelet with hidden clasp, original diamond/ruby bezel and champagne 1...
Category

1990s Modern Ruby Watches

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

1980s Diamond Heart Ruby 18 Karat Yellow Gold Ladies Watch
Located in Miami, FL
This stunning estate ladies watch is crafted in solid 18K yellow gold. This exquisite time piece displays a cuff design and is accented with 100 genuine round cut diamonds approx 2....
Category

1980s Modern Vintage Ruby Watches

Materials

Diamond, Ruby, Yellow Gold

Cartier Trinity 18 Karat Tri Color 2357 Sapphire, Ruby, and Diamond Ladies Watch
Located in New York, NY
This stunning timepiece from Cartier's Trinity collection features yellow, white, and rose gold bezel spiraling gracefully towards the dial. The bezel is pave set with diamonds, sapp...
Category

20th Century Modern Ruby Watches

Materials

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

Gold Diamond Ruby Bracelet/Watch
Located in Marcianise, Marcianise (CE)
shipping policy: No additional costs will be added to this order. Shipping costs will be totally covered by the seller (customs duties included). Buyer will be in charge of these cus...
Category

Late 20th Century Retro Ruby Watches

Materials

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

Retro Platinum Yellow Gold Diamond Burma Ruby Wristwatch
Located in New York, NY
This unique Retro 1940s ladies wristwatch is designed with alternating discs of rubies set in yellow gold and round brilliant cut diamonds set in platinum, graduating in size and are...
Category

1940s Retro Vintage Ruby Watches

Materials

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

Antique Rossel & Fils 18k Gold Diamond & Ruby Encrusted Timepiece & Gold Chain
Located in New York, NY
One of the most beautiful antique timepieces we have ever come across by maker Rossel & Fils (Geneva) Looks great on a long chain as pictured & gorgeous worn on a short chain. See p...
Category

Late 19th Century Antique Ruby Watches

Materials

Diamond, Ruby, 18k Gold

Ladies Platinum Yellow Gold Diamond Ruby Retro Wristwatch
Located in New York, NY
Alternating discs of rubies set in yellow gold and round brilliant cut diamonds set in platinum, graduating in size, connect to two bands of rope chained yellow gold links. The cente...
Category

1940s Vintage Ruby Watches

Materials

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

Tiffany & Co. Midcentury Diamond Ruby Gold Ladies Watch
Located in New York, NY
Mid century Tiffany & CO 14k gold watch, with fabric band and non gold buckle. Case measures 13mm excl crown x 41mm. Band is 6.5" long. Case decorated with diamonds and rubies. Gruen...
Category

20th Century Ruby Watches

Materials

Diamond, Ruby, Gold

Tiffany & Co. Cushion Shaped Diamond and Ruby Bezel Watch in Yellow Gold
Located in Palm Beach, FL
This elegant champagne dial 14K Yellow Gold Tiffany & Co. wristwatch with a cushion shaped diamond bezel, is set with 2 brilliant rubies at the 12 o'clock, 3 o'clock, 6 o'clock, an...
Category

1970s Vintage Ruby Watches

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

Longines Gold Rubies Diamonds Russian Gold Lady Watch Bracelet, 1910
Located in Herzelia, IL
Gold Case Longines Swiss Watch with fine Diamonds and Rubies. Highly important and collectable item. Longines Swiss watch specially designed for a high society Russian customer. Brac...
Category

Early 20th Century Art Deco Ruby Watches

Materials

Diamond, Ruby, Gold

Movado Triple Date Calendar Ruby Dial Mechanic Rose Yellow Gold Wristwatch
Located in London, GB
This vintage Movado Triple Calendar Date watch from the 40's is a very scarce model with six rubies set on the dial. It's made in 18K gold (rose/yellow) and is in very good condition...
Category

1940s Vintage Ruby Watches

Materials

Ruby, 18k Gold, Rose Gold

Ladies Platinum Diamond Ruby Art Deco Cocktail Wristwatch
Located in London, GB
An Art Deco ruby and diamond cocktail wristwatch, square dial with dot and baton hour markers, surrounded by French cut rubies and baguette cut diamonds in a rectangular platinum cas...
Category

1930s Art Deco Vintage Ruby Watches

Materials

Diamond, Ruby, Platinum

Vintage UTI Skeleton Pocket Watch with Onyx and Rubies
Located in New York, NY
A stunning 42mm pocket watch by UTI Paris in yellow gold and onyx, encircled by 44 rubies on its sides. Circa 1960s. An open skeleton back reveals the movement.
Category

1960s Vintage Ruby Watches

Materials

Onyx, Ruby, Yellow Gold

Cartier Santos Ruby and Diamond 18 Karat Yellow Gold Manual Wind Wristwatch
Located in London, GB
Cartier Santos Ruby and Diamond 18 Karat Yellow Gold Manual Wind Wristwatch Circa 1980 A rare and unusual lady’s Cartier manual wind wrist-watch of 18 karat yellow gold. The bezel i...
Category

1980s Modern Vintage Ruby Watches

Materials

Diamond, Quartz, Ruby, Yellow Gold

Rolex Rare Zenith Movement Cosmograph Daytona Diamond and Ruby Dial Sapphire Set
Located in London, GB
A Rare 40 mm 18k Yellow Gold Oyster Perpetual Zenith Movement Cosmograph Daytona Gents Wristwatch, pavé diamond dial set with 8 applied round brilliant cut ruby hour markers, 30 minu...
Category

21st Century and Contemporary Ruby Watches

Materials

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

1960s Gubelin 18 Karat Yellow Gold Double-Row Diamond & Ruby Set Bracelet Watch
Located in New york, NY
A 1960s Gubelin 18kt Yellow Gold Premier Double Row Diamond & Ruby Set Bracelet Watch Basic Specifications & Case Dimensions Case Dimensions - 20 mm x 20mm - Fits up to a 190mm wr...
Category

1960s Retro Vintage Ruby Watches

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Rolex Two-Tone Ladies Datejust 1998, Automatic Diamond Ruby Dial 18 Karat Gold
Located in New York, NY
Rolex Two-Tone Ladies Datejust 1998, Automatic Diamond Ruby Dial 18 Karat Gold SKU: WA00003 PRIMARY DETAILS Brand: Rolex Model: Two Tone Ladies Rolex Datejust Country of Origin: S...
Category

20th Century Modern Ruby Watches

Materials

Diamond, Ruby, 18k Gold, Yellow Gold, Stainless Steel, Gold

Retro Covered Ladies White Gold Diamond Ruby Evening Dress Watch by Altair
Located in Miami Beach, FL
Stunning evening ladies dress watch from the Retro period, It looks like a bracelet, but when you open the flap and you have the time. This 1940s wristwatch by Altair is 14k white ...
Category

1940s Retro Vintage Ruby Watches

Materials

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

Limited Edition Anniversary Cartier Pasha Removable Grid Box and Papers W3102255
Located in Antwerp, BE
Limited Edition Anniversary Cartier Pasha, Removable Grid, Box&Papers W3102255 Cartier Pasha limited edition for the 150th Anniversary. This Cartier is number 1477 out of 1847 of th...
Category

20th Century Ruby Watches

Materials

Ruby, Stainless Steel

Bulgari Ladies Diamond Turquoise Rose Gold Serpenti Secret Wristwatch
Located in New York, NY
Bulgari Serpenti Secret 40mm Turquoise Watch in 18k Rose Gold. This ‘Secret’ bracelet watch is one of the latest renditions of the iconic Serpenti by Bulgari, dating from 2016. The t...
Category

21st Century and Contemporary Ruby Watches

Materials

Diamond, Ruby, Turquoise, 18k Gold

Rolex GMT Master II Ref. 116710 Sapphire, Ruby & Diamond Stainless Steel Watch
Located in Miami, FL
Brand: Rolex Model Name: GMT - Master II Model Number: 116710 Movement: Automatic Case Size: 40 mm Case Material: Stainless Steel Bezel: Custom Gemstones: Sapphires, Diamonds...
Category

Early 2000s Ruby Watches

Materials

Diamond, Ruby, Blue Sapphire, Steel, Stainless Steel

Chopard Happy Sport Pink Diamond Ruby Gold Watch
Located in New York, NY
18k rose gold Happy Sport Chopard lady's watch, set with 1.60ctw in pink diamonds, rubies on the bezel (one stone is chipped) and floating 3 diamonds 2 rubies. other red Chopard band...
Category

21st Century and Contemporary Ruby Watches

Materials

Pink Diamond, Ruby, Gold

Vintage and Antique Ruby Jewelry

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 that 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.