A Rouvenat signature and iconic motif at the heart of Bolt necklaces, the Tag ring is entirely paved with diamonds, with a central flower in polished and brushed gold. The delicate p...

Category

2010s French Fashion Rings

Materials

Ruby, Diamond, 18k Gold, Rose Gold

Tag Ring, Rose Gold, Diamond Paved and Ruby

$23,731 / item

Art Deco Enamel Ruby Diamond Silver Compact/Box

By Chaumet

Located in Kerkrade, NL

on the box is probably gold, with rubies and diamonds. The box is circa 7,5 cm long, circa 6 cm

Category

Early 20th Century French Art Deco Boxes and Cases

Materials

Diamond, Ruby, Silver

Art Deco Enamel Ruby Diamond Silver Compact/Box

$2,610

Boucheron 18 Karat Gold Eiffel Tower Ruby Diamond Brooch

By Boucheron

Located in Fort Lauderdale, FL

Paris Eiffel Tower brooch by Boucheron crafted in 18-karat yellow gold with rubies and diamonds

Category

21st Century and Contemporary French Brooches

Materials

Diamond, Ruby, 18k Gold

Boucheron 18 Karat Gold Eiffel Tower Ruby Diamond Brooch

$14,800

Rose Quartz Jade Ruby Carved French Bulldogs Gold Hinged Box

Located in Palm Beach, FL

This finely carved art deco Jade French bulldogs with ruby eyes box is incredibly detailed. One dog

Category

Vintage 1920s Art Deco Boxes and Cases

Materials

Jade, Quartz, 14k Gold

Rose Quartz Jade Ruby Carved French Bulldogs Gold Hinged Box

$6,500

1960s Marchak Ruby Morganite Diamond Gold Platinum Ring

By Marchak

Located in Paris, FR

An exquisite cocktail ring by Marchak embellished with gold, ruby, morganite and diamonds. The

Category

Vintage 1960s French Cocktail Rings

Materials

Diamond, Morganite, Ruby, 18k Gold, Platinum

1960s Marchak Ruby Morganite Diamond Gold Platinum Ring

$51,022

Ruby and Diamond Gold Heart with Stars Locket

Located in Houston, TX

ruby in the center is trimmed with old European cut diamonds. 8 raised stars are each set with a ruby

Category

Antique 1890s French Victorian Pendant Necklaces

Materials

Diamond, Ruby, 18k Gold, Sterling Silver

Ruby and Diamond Gold Heart with Stars Locket

$2,875

Venice, Rose Quartz and Ruby, yellow gold, neckless, marquise

Located in Paris, FR

necklace, sapphires or rubies, the rose quartz marquise is soft and full of good energy.

Category

21st Century and Contemporary French More Necklaces

Materials

Quartz, Ruby, 18k Gold

Venice, Rose Quartz and Ruby, yellow gold, neckless, marquise

$3,322

Boucheron Art Deco Ruby Cufflink and Collar Pin Set, circa 1930

By Boucheron

Located in Newport Beach, CA

style! With original Box! 1 Carat of good quality French cut Rubies. Classic Double sided cufflinks

Category

Vintage 1930s French Art Deco Cufflinks

Materials

Ruby, Platinum

Boucheron Art Deco Ruby Cufflink and Collar Pin Set, circa 1930

$6,550

CARTIER Elegant Ruby, Sapphire, Emerald and Diamond Ring

Located in Bay Harbor Islands, FL

Ruby, Sapphire, Emerald and Diamonds.Size 7.

Category

Late 20th Century French Band Rings

Materials

Ruby, Sapphire, Emerald, Diamond, 18k Gold

CARTIER Elegant Ruby, Sapphire, Emerald and Diamond Ring

$10,000

CARTIER Elegant Ruby, Sapphire, Emerald and Diamond Earrings

Located in Bay Harbor Islands, FL

. It is embellished with Ruby,Sapphire, Emerald and Diamonds.

Category

Late 20th Century French Clip-on Earrings

Materials

Ruby, Sapphire, Emerald, Diamond, 18k Gold

CARTIER Elegant Ruby, Sapphire, Emerald and Diamond Earrings

$30,000

CARTIER Amazing Ruby, Sapphire, Emerald and Diamond Bracelet

Located in Bay Harbor Islands, FL

Ruby, Sapphires, and Emeralds. It is also embellished by 7.2cts Diamonds.

Category

Late 20th Century French Cuff Bracelets

Materials

Ruby, Sapphire, Emerald, Diamond, 18k Gold

CARTIER Amazing Ruby, Sapphire, Emerald and Diamond Bracelet

$35,000

Marguerite diamond ruby ring in 18-karat white gold

Located in PARIS, FR

Marguerite diamond ruby ring in 18-karat white gold. The ring features a central significant old

Category

Vintage 1970s French Modern Cluster Rings

Materials

Diamond, Ruby, White Gold

Marguerite diamond ruby ring in 18-karat white gold

$3,986 / set

Certified Retro Ruby Diamonds 18 Carats White Gold Ring

Located in Paris, FR

Magnificent ring set with a Thai ruby in a setting of brilliant and navette diamonds. Estimated

Category

Vintage 1970s French Modern Fashion Rings

Materials

Diamond, Ruby, White Gold

Certified Retro Ruby Diamonds 18 Carats White Gold Ring

$8,899

Ruby Diamond Ring Set in 18K White Gold

Located in ANTWERPEN, BE

A Ruby & Diamond Ring Set In 18K White Gold. A stellar explosion with a resemblance of a deep

Category

21st Century and Contemporary French More Rings

Materials

White Diamond, Ruby, 18k Gold, White Gold

Ruby Diamond Ring Set in 18K White Gold

$187,358

Ruby Diamond Floral Necklace 18 Karat White Gold

Located in Geneva, CH

Exquisite 18K White Gold Floral Necklace Featuring Oval Rubies & Diamonds, Certified with

Category

21st Century and Contemporary French Modern Link Necklaces

Materials

Diamond, Ruby, 18k Gold, White Gold

Ruby Diamond Floral Necklace 18 Karat White Gold

$8,187

Brooch Yellow Gold Ruby

Located in PARIS, FR

ruby round about 0.17 ct. 4 brilliant-cut diamonds of about 0.07 ct each. total weight diamonds

Category

20th Century French Brooches

Materials

Yellow Gold

Brooch Yellow Gold Ruby

$1,826

Bracelet Yellow Gold Ruby

Located in PARIS, FR

Bracelet rigid ring in 750 thousandths yellow gold (18K). round shape. set with a round ruby

Category

20th Century French More Bracelets

Materials

Yellow Gold

Bracelet Yellow Gold Ruby

$4,016

Belle Époque Diamond, Red Enamel and Rubies Marquise Ring

Located in Paris, FR

diamonds and red enamel rectangular line interspersed with four round rubies and then again bordered with

Category

Antique Early 1900s French Belle Époque Signet Rings

Materials

Diamond, Ruby, 18k Gold

Belle Époque Diamond, Red Enamel and Rubies Marquise Ring

$17,798

13.87 Carat Ruby and Diamond Platinum Bracelet

By Shreve, Crump Low

Located in Chestnut Hill, MA

Platinum ruby and diamond inline bracelet consisting of 56 french cut rubies having a total weight

Category

20th Century More Bracelets

Materials

Diamond, White Diamond, Ruby, Platinum

13.87 Carat Ruby and Diamond Platinum Bracelet

$27,000

3.05 Carats Diamond and Ruby Dangle Earrings

Located in Carmel, CA

. The diamonds weigh a total of 3.05 carats and are accented by french cut rubies. The earrings are

Category

21st Century and Contemporary Art Deco Dangle Earrings

Materials

Diamond, Ruby, Platinum

3.05 Carats Diamond and Ruby Dangle Earrings

$9,995

Retro Turquoise Ruby and Diamond Bracelet

Located in Chestnut Hill, MA

18 karat yellow gold Retro period French Turquoise Ruby an diamond barber pole bracelet 8 inches

Category

Mid-20th Century Unknown Retro Retro Bracelets

Materials

Diamond, Ruby, Turquoise, 18k Gold

Retro Turquoise Ruby and Diamond Bracelet

$60,000

David Tishbi 22K Ruby Beads Drop Earrings

Located in Pacific Palisades, CA

22K Ruby Beads Drop Earrings Length: 2″ 2.5mm Ruby 21 CTW French Wire

Category

21st Century and Contemporary American Modern Drop Earrings

Materials

Ruby, 22k Gold

David Tishbi 22K Ruby Beads Drop Earrings

$7,800

Marina B Bulgari Diamond and Ruby Ring Bandeau 2 Navettes

By Marina B

Located in London, GB

, centred by an oval cabochon ruby and two marquise diamonds Signed Marina B, maker's mark, French hallmarks

Category

Vintage 1980s French Cocktail Rings

Materials

Diamond, Ruby, 18k Gold

Marina B Bulgari Diamond and Ruby Ring Bandeau 2 Navettes

$8,206

18K White Gold Invisible-Set Ruby Diamond Floral Spring Bangle

Located in Khet Bang Rak, Krung Thep Maha Nakhon

of invisibly-set natural rubies shaped into a graceful flower, the piece is accented with a sparkling

Category

2010s Thai Art Deco Modern Bracelets

Materials

Diamond, Ruby, 18k Gold, White Gold

18K White Gold Invisible-Set Ruby Diamond Floral Spring Bangle

$26,850 / item

VAN CLEEF ARPELS. A Turquoise, Ruby and Diamond Cocktail Ring.

By Van Cleef Arpels

Located in London, GB

Of cluster design, composed of a central turquoise cabochon within a border of circular-cut rubies

Category

Vintage 1960s French Cluster Rings

Materials

Ruby, Turquoise, Diamond, 18k Gold

VAN CLEEF ARPELS. A Turquoise, Ruby and Diamond Cocktail Ring.

$25,500

Platinum 2.67 Carat Ruby and Diamond Earrings

By Shreve, Crump Low

Located in Chestnut Hill, MA

2.67 carats, set with full cut diamonds and French cut rubies, in a intricate open work design.

Category

21st Century and Contemporary Unknown Contemporary Drop Earrings

Materials

Diamond, Ruby, Platinum

Platinum 2.67 Carat Ruby and Diamond Earrings

$63,000

Vintage Rubies Diamonds 18 Carats White Gold Wedding Band

Located in Paris, FR

White gold wedding band set with a full circle of alternating rubies and diamonds. Total estimated

Category

Vintage 1970s French Modern Wedding Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

Vintage Rubies Diamonds 18 Carats White Gold Wedding Band

$1,186

Art Deco Cartier Ruby and Diamond Brooch

By Cartier

Located in Atlanta, GA

Art Deco Platinum, 18 Karat Gold, Ruby and Diamond Brooch by Cartier, Paris • Signed Cartier Paris

Category

Vintage 1920s French Art Deco Brooches

Materials

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

Art Deco Cartier Ruby and Diamond Brooch

$11,750

Art Nouveau Ruby Diamond 18k Gold Bracelet, Paris, circa 1890

Located in Goettingen, DE

Art Nouveau Ruby Diamond 18K Gold Bracelet, Paris circa 1890 This very decorative gold bracelet

Category

Antique 1890s French Art Nouveau Link Bracelets

Materials

Diamond, Ruby, 18k Gold

Art Nouveau Ruby Diamond 18k Gold Bracelet, Paris, circa 1890

$8,068

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 Red Ruby Diamond Swirl Dome Ring

$4,500

Vivid Ruby Diamond Double Halo Cocktail Ring

By Treasure of Shahrazad

Located in Suriyawong Bangeak, TH

beautiful diamonds and again surround by beautiful cut french cut rubies and to finish of the ring diamonds

Category

2010s Thai Art Deco Cluster Rings

Materials

Diamond, Ruby, 18k Gold

Vivid Ruby Diamond Double Halo Cocktail Ring

$1,500

Van Cleef Arpels Paris Diamond Ruby Cabochon Gold Leaf Brooch

By Van Cleef Arpels

Located in Beverly Hills, CA

Cabochon Rubies. Made in France. Diameter is 48mm.

Category

20th Century French Modern Brooches

Materials

White Diamond, Ruby, 18k Gold

Van Cleef Arpels Paris Diamond Ruby Cabochon Gold Leaf Brooch

$45,000

Necklace, Polki Diamonds, Ruby 22, Karat Gold

By 5 OCTOBRE

Located in Paris, FR

Unique customized piece in 18 carat with an antique pendant in 22K gold set with rubis and polki diamonds. Brand : 5 OCTOBRE Designer : Sophie Pfeffer

Category

Early 20th Century French Anglo-Indian Chain Necklaces

Materials

Diamond, Ruby, 22k Gold, Yellow Gold

Necklace, Polki Diamonds, Ruby 22, Karat Gold

$2,525

Van Cleef Arpels, A Pair of Ruby and Diamond Ear Clips

By Van Cleef Arpels

Located in New York, NY

Van Cleef & Arpels: A Pair of Ruby and Diamond Ear Clips, of bombe design, set with circular-cut

Category

Vintage 1960s French Clip-on Earrings

Materials

Diamond, Ruby, Gold, Platinum

Van Cleef Arpels, A Pair of Ruby and Diamond Ear Clips

Vintage Cartier Gaia Emerald, Ruby and Diamond Ring

By Cartier

Located in Los Angeles, CA

shanks accented with onyx, rubies and approximately 0.04ct of diamonds. The ring's main attraction is a

Category

Mid-20th Century French Art Deco Cocktail Rings

Materials

Diamond, Emerald, Onyx, Ruby, 18k Gold

Vintage Cartier Gaia Emerald, Ruby and Diamond Ring

$4,860

Chess Style Jewelry Gold Ring with Diamonds and Burmese Rubies

Located in Sofia , BG

Amazing chess style jewelry gold ring,1.44ct Diamonds & 5.75ct Burmese rubies ring! The ring is

Category

Vintage 1930s French Art Deco Engagement Rings

Materials

Ruby, 18k Gold

Chess Style Jewelry Gold Ring with Diamonds and Burmese Rubies

$19,459

2.61 Carat GRS Certified Blood Red Ruby and Diamond Ring

Located in Grenoble, FR

This beautiful ring is accompanied by a magnificent natural ruby weighting 1.54 carats. Diamonds

Category

2010s French Modern Fashion Rings

Materials

Diamond, Ruby, 18k Gold

2.61 Carat GRS Certified Blood Red Ruby and Diamond Ring

$8,294

Natural Pearl Emerald Ruby Diamond Gold Crown Brooch

Located in New York, NY

and four cushion rubies of superb color and luster and old cut diamonds, mounted in 18 karat yellow

Category

Antique 19th Century French Brooches

Materials

Diamond, White Diamond, Emerald, Natural Pearl, Ruby, 18k Gold, Yellow Gold

Natural Pearl Emerald Ruby Diamond Gold Crown Brooch

$22,500

Mira Ruby Heart Charm in 18k Gold by Elie Top

By Elie Top

Located in Paris, France

Gold and distressed silver charm. Rotating sphere revealing a ruby surrounded by diamonds

Category

21st Century and Contemporary French Neoclassical Pendant Necklaces

Materials

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

Mira Ruby Heart Charm in 18k Gold by Elie Top

$7,356

Boucheron 18 Karat Yellow Gold Ruby and Diamond Necklace

By Boucheron

Located in New York, NY

rubies and a diamond cross over. Classic box clasp with tongue and safety closure at the back. This

Category

Vintage 1960s French Retro Drop Necklaces

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Boucheron 18 Karat Yellow Gold Ruby and Diamond Necklace

$39,000

G.Minner Burma Ruby Diamonds Gold Heart Pendant

By G.MINNER

Located in Colmar, FR

A G.MINNER white and yellow gold clip pendant set with a beautiful heart-shaped Burmese ruby

Category

1990s French Pendant Necklaces

Materials

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

G.Minner Burma Ruby Diamonds Gold Heart Pendant

$35,573

Sylvie Corbelin Signature Snake Ring in 18K Rose Gold and Rubies

By Sylvie Corbelin

Located in Saint Ouen, FR

Limited edition of a snake ring in 750/1000 rosegold (18K) by Sylvie Corbelin On each eye, a ruby

Category

2010s French Baroque Signet Rings

Materials

Ruby, 18k Gold, Rose Gold

Sylvie Corbelin Signature Snake Ring in 18K Rose Gold and Rubies

$4,734

Cartier Paris, Diamond Ruby Gold and Platinum Earrings, Circa 1955

By Cartier

Located in New York, NY

Diamond Ruby 18K Gold and Platinum Earrings; 90 Diamonds approx 3.50ct, 26 Rubies approx 4ct

Category

Vintage 1950s French Modern Clip-on Earrings

Materials

Diamond, Ruby, Gold, 18k Gold, Platinum

Cartier Paris, Diamond Ruby Gold and Platinum Earrings, Circa 1955

$75,000

1950s Van Cleef Arpels Ruby Sapphire Diamond Gold "Couscous" Necklace

By Van Cleef Arpels

Located in Kortrijk, BE

A beautiful ruby, sapphire and diamond 'couscous' necklace by Van Cleef & Arpels, the flexible

Category

Vintage 1950s French Retro Rope Necklaces

Materials

Blue Sapphire, Diamond, Ruby, 18k Gold

1950s Van Cleef Arpels Ruby Sapphire Diamond Gold "Couscous" Necklace

$106,791

Trilogy ruby and diamond ring in 18k gold, wedding ring

Located in PARIS, FR

Trilogy ruby and diamond ring in 18-karat yellow gold. In the centre, a beautiful oval ruby with

Category

1990s French Modernist Three-Stone Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Trilogy ruby and diamond ring in 18k gold, wedding ring

$3,559

Ruby Diamond Heaume Ring in 18k Yellow Gold by Elie Top

By Elie Top

Located in Paris, France

Yellow gold and distressed silver ring studded with an oval ruby surrounded by diamonds set on a

Category

21st Century and Contemporary French Neoclassical Fashion Rings

Materials

Diamond, Ruby, Yellow Gold, Silver

Ruby Diamond Heaume Ring in 18k Yellow Gold by Elie Top

$9,967

Signed Georges Braque Yellow Gold Ring Set with Baguette Cut Rubies

By Georges Braque

Located in Vienna, Österreich

This unique ring was designed by Georges Braque and made by Heger de Löwenfeld in Paris, France, in

Category

Vintage 1960s French Modernist More Rings

Materials

Ruby, 18k Gold

Signed Georges Braque Yellow Gold Ring Set with Baguette Cut Rubies

$45,089

diamond and ruby target ring

Located in New York, NY

A wide band of channel set natural Burmese rubies surround a 1.30 ct diamond. The ring is

Category

French Engagement Rings

Materials

Diamond

diamond and ruby target ring

$8,000

18K Art Deco Invisible-Set Ruby Dome Ring with Marquise Diamond Cluster

Located in Khet Bang Rak, Krung Thep Maha Nakhon

karat white gold and showcases a mesmerizing composition of natural rubies in an invisible setting

Category

2010s Thai Art Deco Dome Rings

Materials

Diamond, Ruby, 18k Gold

18K Art Deco Invisible-Set Ruby Dome Ring with Marquise Diamond Cluster

$16,200

Bridal Cluster Ruby Diamond Ring in White Gold 18 Karats

Located in PARIS, FR

Cluster ruby diamond ring in white gold 18 karats. Cluster halo ring with an oval ruby in closed

Category

1990s French Contemporary Bridal Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

Bridal Cluster Ruby Diamond Ring in White Gold 18 Karats

$4,508

Late 20th Century 3.25 Carat Natural Thai Ruby and Diamond Platinum Ring

Located in Theydon Bois, Essex

Sophisticated and elegant. The high quality Thai ruby displays a deep red with clear flashes of

Category

Late 20th Century French Cluster Rings

Materials

Diamond, Ruby, Platinum

Late 20th Century 3.25 Carat Natural Thai Ruby and Diamond Platinum Ring

$13,130

2.42 Carat Burma Ruby Diamond Two-Color Gold Ring

Located in Colmar, FR

A white and yellow gold ring set in the middle with a stunning burma ruby surrounded by 5 baguette

Category

2010s French Cocktail Rings

Materials

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

2.42 Carat Burma Ruby Diamond Two-Color Gold Ring

$27,231

Certified 1.80 Carats Burmese Ruby Diamonds 18 Carats White Gold Ring

By Les Pierres de Julie

Located in Paris, FR

Beautiful ring set with a 1.80 carats Burmese ruby in a brilliant diamond setting. Weight of the

Category

2010s French Modern Engagement Rings

Materials

Diamond, Ruby, White Gold

Certified 1.80 Carats Burmese Ruby Diamonds 18 Carats White Gold Ring

$8,187

1950s J.Lacloche Diamonds and Ruby Gold Earrings Brooch Set.

Located in Beziers, FR

18K Gold,Diamonds and Ruby Earrings and Brooch Set. Signed by J.LACLOCHE Paris-Cannes. Circa 1950

Category

Vintage 1950s French Clip-on Earrings

Materials

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

1950s J.Lacloche Diamonds and Ruby Gold Earrings Brooch Set.

$20,764

Froment-Meurice Renaissance Revival Enamel Pearl Ruby Silver Gold Brooch

By François-Désiré Froment-Meurice

Located in Lisbon, PT

. Decorated with enamel, pearls and rubies and with a natural Keshi pearl. Signed Froment-Meurice

Category

Antique Early 19th Century French Renaissance Revival Brooches

Materials

Pearl, Ruby, Gold, Silver

Froment-Meurice Renaissance Revival Enamel Pearl Ruby Silver Gold Brooch

$23,731

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French Ruby For Sale on 1stDibs

Surely you’ll find the exact french ruby you’re seeking on 1stDibs — we’ve got a vast assortment 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. Our collection of these items for sale includes 733 vintage editions and 62 modern creations to choose from as well. Finding the perfect french ruby may mean sifting through those created during different time periods — you can find an early version that dates to the 18th Century and a newer variation that were made as recently as the 21st Century. For this particular accessory, there are many different carat weights to choose from, but .5 Carat and 1 Carat versions are of considerable interest. There have been many well-made iterations of the classic french ruby over the years, but those made by A. Augis, Baume and Cartier are often thought to be among the most beautiful. See these pages for a french cut iteration of this accessory, while there are also round cut cut and rose cut cut versions available here, too. Most of our french ruby for sale are for women, but there are 196 pieces available to browse for men.

How Much is a French Ruby?

On average, a french ruby at 1stDibs sells for $5,220, while they’re typically $375 on the low end and $1,575,000 for the highest priced versions of this item.

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.