How big is a 12 carat diamond?

The size of a 12 carat diamond is dependent on diamond cut. A 12 carat round diamond is roughly 15 mm in size.

How many carats should a diamond wedding ring be?

There is no rule for how many carats a diamond wedding ring should be. You're free to choose a ring with a carat weight that appeals to you and fits your budget. The average carat weight for diamond wedding rings is 1 to 1.9 carats. Shop an assortment of diamond wedding rings on 1stDibs.

How many carats was Elizabeth Taylor's diamond ring?

Elizabeth Taylor's famous diamond ring was 33.19 carats. Although many people believe the Krupp diamond ring was an engagement gift, Richard Burton actually bought the gorgeous Asscher-cut ring to mark their five-year anniversary. For their engagement, Burton presented Taylor with an 18.61-carat emerald and diamond pendant made by Bulgari. The pendant detached from its necklace and could double as a brooch. Explore a large selection of diamond rings on 1stDibs.

12 Carat Diamond Ring

12ct Emerald Ring

Multi Colored Diamond Ring

12 Carat Emerald Green

12 Carat Eternity Band

Yellow Sapphire 12 Carats

12mm South Sea Pearl

2010s American Contemporary Cocktail Rings

Materials

Diamond, 18k Gold, White Gold

GIA Certified 12 Carat Cushion Cut Diamond Ring

$552,000Sale Price|20% Off

$103,600Sale Price|20% Off

Vintage 2.62 Carat Diamond and 12 Karat White Gold Cluster Ring

Located in Jesmond, Newcastle Upon Tyne

A stunning, fine and impressive vintage 2.62 carat diamond and 12 karat white gold cluster ring; part of our diverse diamond jewelry and estate jewelry collections.

Category

Vintage 1960s Unknown Cocktail Rings

Materials

Diamond, White Gold

TRIO Italian 18K Two-Tone 12 Carat Amethyst Diamond Cocktail Ring

$8,900

$7,900

Amethyst 12 Carat Pear Shape with Diamonds Paradizia Ring R115

By Paradizia

Located in Laguna Beach, CA

Search Item # R115 Materials and Weight Amethyst 12 cts, 12.8 x 9.1mm, faceted pear shape Diamonds, 1.64 carats Rhodium sterling silver setting 14k yellow gold band Size 7 Made in...

Category

21st Century and Contemporary Artisan Cocktail Rings

Materials

Amethyst, 14k Gold, Rhodium, Sterling Silver

GIA 12 Carat Emerald Cut Diamond Ring in 18K Yellow Gold

$215,000

GIA 12 Carat Emerald Cut Diamond Ring in 18K Yellow Gold

Located in Los Angeles, CA

Gorgeous 12.00 ct. W to X VS1 diamond emerald cut. Handmade in 18k yellow gold. Ring size 6.5. Comes with GIA certificate.

Category

21st Century and Contemporary Solitaire Rings

Materials

Diamond, Yellow Gold

12 Carat Blue Chalcedony Diamond Designer Stambolian Ring Estate Fine Jewelry

$4,950

12 Carat Blue Chalcedony Diamond Designer Stambolian Ring Estate Fine Jewelry

By Stambolian

Located in Montreal, QC

Timeless and finely detailed Blue Chalcedony and Diamond Cocktail Ring, center securely nestled with a Hand set 12 Carat Blue Chalcedony and accented by Diamonds, weighing approx. 0....

Category

21st Century and Contemporary Modern Cocktail Rings

Materials

Chalcedony, Diamond, 18k Gold, Yellow Gold

$175,000

AGL Cert. 12 Carat Colombian Emerald Art Deco Antique Platinum Ring

Located in Miami, FL

Antique AGL-certified 12 carat square emerald cut Colombian emerald in platinum Art Deco filigree setting with old mine cut diamond accents and milgrain detailing.

Category

Vintage 1920s Art Deco Cocktail Rings

Materials

Diamond, Emerald, Platinum

12 Carat Fancy Intense Yellow VS1 Radiant Cut Diamond Three Stone Platinum Ring

$967,000

$2,850

Roman Malakov 12 mm Golden South Sea Pearl & Round Diamond Cocktail Ring

By Roman Malakov

Located in New York, NY

A classy cocktail ring, showcasing one 12.00 millimeter golden south sea pearl flanked by two round brilliant cut diamonds weighing 0.32 carat total. Finely made with 18K white gold....

Category

21st Century and Contemporary American Contemporary Cocktail Rings

Materials

Diamond, Pearl, South Sea Pearl, 18k Gold, White Gold

Roman Malakov 12 mm Cultured South Sea Pearl & Round Cut Diamond Cocktail Ring

$5,000

Roman Malakov 12 mm Cultured South Sea Pearl & Round Cut Diamond Cocktail Ring

By Roman Malakov

Located in New York, NY

Accented by round brilliant cut diamonds weighing 1.14 carats total, set on a micropavé setting.

Category

21st Century and Contemporary American Contemporary Cocktail Rings

Materials

Diamond, Pearl, Cultured Pearl, South Sea Pearl, 18k Gold, White Gold

Vintage 12 Ct Natural Carved Emerald & 1.5 Ct Diamond Ring 18 Kt Yellow Gold

$8,500

Vintage 12 Ct Natural Carved Emerald & 1.5 Ct Diamond Ring 18 Kt Yellow Gold

Located in New York, NY

Vintage 18 Karat Yellow Gold Ring Size 6.5 featuring a single solitaire natural carved emerald approximately 12 ct with beautiful color and clarity. Accompanied by brilliant cut diam...

Category

Early 2000s Solitaire Rings

Materials

Diamond, Emerald, 14k Gold, Yellow Gold

16.55 mm South Sea Pearl And 12 Carat Burma Sapphire "Head Turner'' 18K Ring

$12,500

14K Heart Dangle Ring

Located in Miami, FL

Features 14K yellow gold .12 carat total weight diamonds Ring size 7

Category

21st Century and Contemporary North American Contemporary Fashion Rings

Materials

Diamond, 14k Gold, Yellow Gold

Sophia D. Three Stone Ring

$54,000

Sophia D. Three Stone Ring

By Sophia D

Located in New York, NY

Total center diamond weight: 1.82 carats Total center blue sapphire weight: 2.15 carats Total blue sapphire weight: 0.80 carats Total diamond weight: .12 carats Ring size is 6.5 and...

Materials

Diamond, Opal, Gold, 14k Gold

Recent Sales

Retro Three-Stone .12 Carat Diamond Ring .33 Carat Ruby

Unavailable

Retro Three-Stone .12 Carat Diamond Ring .33 Carat Ruby

Located in Tampa, FL

A beautiful Retro ruby and diamond 3-stone Antique Engagement or Fashion ring features a .12ct. European cut center diamond with SI2 clarity and H color. The round rubies, set around...

Category

Vintage 1940s Unknown Retro Fashion Rings

Materials

Diamond, Ruby, 14k Gold, Rose Gold

12 Carat pear Brilliant Statement Fancy Yellow Diamond Ring

Unavailable

12 Carat pear Brilliant Statement Fancy Yellow Diamond Ring

Located in Mumbai, IN

Approximately 12 carats, round brilliant, statement ring, diamond ring.

Category

21st Century and Contemporary Indian Contemporary Engagement Rings

Materials

Yellow Diamond, 14k Gold, White Gold

14, 12 Carat Tanzanite 4, 12 Carat Diamond 18 Karat Rose Gold Heritage Ring

Unavailable

Unavailable

18 Karat Yellow Gold 12 Carat Emerald Diamond Cluster Ring

By Jiedy Jewels

Located in Indooroopilly, QLD

18 Karat Yellow Gold 12 Carat Emerald Diamond Cluster Ring Handmade 18kt yellow gold hand pierced cluster ring.

Category

2010s Australian Art Deco Cocktail Rings

Materials

Diamond, Emerald, 18k Gold, Yellow Gold

12-Carat D VVS2 Diamond Ring GIA Certified A Majestic Statement

Unavailable

12-Carat D VVS2 Diamond Ring GIA Certified A Majestic Statement

Located in Mumbai, IN

. ⸻ Center Diamond • Carat Weight: 12.00 Carats • Shape: Round Brilliant • Color: D (Absolutely Colorless) • Clarity: VVS2 (Very Very Slightly Included) • Certification: GIA C...

Category

21st Century and Contemporary Indian Empire Bridal Rings

Materials

Diamond, White Diamond, 18k Gold

TATE .74 Carat Ruby and .12 Carat Diamond 18 Karat Yellow Matte Gold Layer Ring

Unavailable

Unavailable

$1,600 / item

6.00 Carat Impressive Red Ruby and Diamond 14 Karat Yellow Gold Ring

Located in Los Angeles, CA

6.00 Carats Impressive Red Ruby and Diamond 14K Yellow Gold Ring Total Red Ruby Weight is: 5.25 Carats (glass-filled) Ruby Measures: 12.14 x 9.65mm Natural Round Diamonds Weight: ...

Category

2010s American Cocktail Rings

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Diamond, Ruby, 14k Gold, Yellow Gold

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Victorian 3.60 Ct Certified Burma Natural Sapphire 2.30 Ct Diamond Ring

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Victorian Tradition Spectacular Victorian period Diamond and Sapphire cluster ring which is in the tradition of the antique jewellery, 1890/1900 ca Hand crafted of solid 18 Kt gold i...

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Antique Late 19th Century European Late Victorian Cluster Rings

$14,950

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Extraordinary Marcel Boucher Early Orchid Brooch

By Marcel Boucher

Located in New York, NY

Extraordinary Marcel Boucher Early Orchid Brooch from the late 1930's. Dimensional and large brooch with amazing design and signature square cut faux ruby stones used primarily by Bo...

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Gilt Metal

Van Cleef & Arpels Gold & Turquoise Desk Clock

$65,000

L 2 in

$53,000

W 1.42 in L 1.7 in

Bvlgari 18K Gold Coral Turquoise Diamond Brooch, Circa 1960s, 6.0ct

By Bulgari

Located in New York, NY

This Bulgari coral and turquoise brooch reflects the house’s postwar Roman exuberance, where bold color and sculptural volume defined a new luxury language. Concentric cabochons reca...

Category

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12 Carat Diamond Ring For Sale on 1stDibs

On 1stDibs, you can find the most appropriate 12 carat diamond ring for your needs in our varied inventory. Every item for sale was constructed with extraordinary care, often using gold, white gold and 18k gold. In our selection of items, you can find a vintage example as well as a contemporary version. Finding the perfect 12 carat diamond ring 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 12 carat diamond ring over the years, but those made by Antinori Fine Jewels, Meghna Jewels and Royaal Stones Ltd are often thought to be among the most beautiful. Today, if you’re looking for an emerald cut version of this piece and are unable to find the perfect match, our selection also includes round cut and oval cut alternatives. There aren’t many items for men if you’re seeking a 12 carat diamond ring, as most of the options available are for women and unisex.

How Much is a 12 Carat Diamond Ring?

The price for a 12 carat diamond ring starts at $1 and tops out at $2,500,000 with these rings, on average, selling for $3,379.

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 Diamond in Jewelry Design

Antique diamond rings, diamond tiaras and dazzling vintage diamond earrings are on the wish lists of every lover of fine jewelry. And diamonds and diamond jewelry are primarily associated with storybook engagements and red-carpet grand entrances — indeed, this ultra-cherished gemstone has a dramatic history on its hands.

From “A Diamond Is Forever” to “Diamonds Are a Girl’s Best Friend,” pop culture has ingrained in our minds that diamonds are the most desired, the most lasting and the most valuable gemstone. But what makes the diamond so special? Each stone — whether it’s rubies, sapphires or another stone — is unique and important in its own right. April babies might claim diamonds for themselves, but just about everyone wants this kind of sparkle in their lives!

There are several factors that set diamonds apart from other stones, and these points are important to our gem education.

Diamonds are minerals. They are made up of almost entirely of carbon (carbon comprises 99.95 percent; the remainder consists of various trace elements). Diamonds are the hardest gemstones, ranking number 10 on the Mohs Hardness Scale. Even its name, diamond, is rooted in the Greek adamas, or unconquerable. The only object that can scratch a diamond is another diamond. Diamonds are formed deep within the earth at very high temperatures (1,652–2,372 degrees Fahrenheit at depths between 90 and 120 miles beneath the earth’s surface) and are carried up by volcanic activity. Diamonds are quite rare, according to the Gemological Institute of America, and only 30 percent of all the diamonds mined in the world are gem quality.

In the 1950s, the Gemological Institute of America developed the 4Cs grading system to classify diamonds: clarity, color, cut and carat weight. Not all diamonds are created equal (there are diamonds, and then there are diamonds). The value of the diamond depends on the clarity (flawless diamonds are very rare but a diamond's value decreases if there are many blemishes or inclusions), color (the less color the higher the grade), cut (how the diamond’s facets catch the light, certain cuts of diamonds show off the stone better than others) and carat weight (the bigger, the better).

When you start shopping for a diamond engagement ring, always prioritize the cut, which plays the largest role in the diamond's beauty (taking the time to clean your diamond ring at least every six months or so plays a role in maintaining said beauty). And on 1stDibs, a range of buying guides can be found for those in the market for antique engagement rings, vintage engagement rings or Art Deco engagement rings.

Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.

Finding the Right Rings for You

Antique and vintage rings have long held a special place in the hearts of fine jewelry lovers all over the world.

No matter their origin or specific characteristics, rings are timeless, versatile accessories. They’ve carried deep meaning since at least the Middle Ages, when diamond rings symbolized strength and other kinds of rings were worn to signify romantic feelings or to denote an affiliation with a religious order. Rings have also forever been emblematic of eternity.

Over time, rings have frequently taken the form of serpents, which have long been associated with eternal life, health and renewal. Italian luxury jewelry house Bulgari has become famous for its widely loved Serpenti motif, for example, and its Serpenti ring, like the other accessories in the collection, began as an homage to jewelry of the Roman and Hellenistic eras. The serpent is now a popular motif in fine jewelry. Jewelry devotees have long pined for rings adorned with reptiles, thanks to antique Victorian rings — well, specifically, Queen Victoria’s illustrious engagement ring, which took the form of a gold snake set with rubies, diamonds and an emerald (her birthstone). Designs for Victorian-era engagement rings often featured repoussé work and chasing, in which patterns are hammered into the metal.

Engagement rings, which are reliably intimidating to shop for, are still widely recognized as symbols of love and commitment. On 1stDibs, a range of buying guides can be found for those in the market for antique engagement rings, vintage engagement rings or Art Deco engagement rings.

The most collectible antique engagement rings and vintage engagement rings are those from the Victorian, Edwardian and Art Deco eras. Named for the monarchies of the four King Georges, who in succession ruled England starting in 1714 (plus King William’s reign), antique Georgian rings, be they engagement rings or otherwise, are also coveted by collectors. Pearls, along with colored gemstones like garnets, rubies and sapphires, were widely used in Georgian jewelry. The late-1700s paste jewelry was a predecessor to what we now call fashion or costume jewelry.

The Art Nouveau movement (1880–1910) brought with it rings inspired by the natural world. Antique Art Nouveau rings might feature depictions of winged insects and fauna as well as women, who were simultaneously eroticized and romanticized, frequently with long flowing hair. Art Deco jewelry, on the other hand, which originated during the 1920s and ’30s, is by and large “white jewelry.” White metals, primarily platinum, were favored over yellow gold in the design of antique Art Deco rings and other accessories as well as geometric motifs, with women drawn to the era’s dazzling cocktail rings in particular.

Whether you’re hunting down a chunky classic for a Prohibition-themed cocktail party or seeking a clean contemporary design to complement your casual ensemble, find an exquisite collection of antique, new and vintage rings on 1stDibs.

Questions About 12 Carat Diamond Ring

How big is a 12 carat diamond?
1 Answer
1stDibs ExpertFebruary 22, 2021
The size of a 12 carat diamond is dependent on diamond cut. A 12 carat round diamond is roughly 15 mm in size.
How many carats should a diamond wedding ring be?
1 Answer
1stDibs ExpertNovember 2, 2023
There is no rule for how many carats a diamond wedding ring should be. You're free to choose a ring with a carat weight that appeals to you and fits your budget. The average carat weight for diamond wedding rings is 1 to 1.9 carats. Shop an assortment of diamond wedding rings on 1stDibs.
How many carats was Elizabeth Taylor's diamond ring?
1 Answer
1stDibs ExpertFebruary 1, 2024
Elizabeth Taylor's famous diamond ring was 33.19 carats. Although many people believe the Krupp diamond ring was an engagement gift, Richard Burton actually bought the gorgeous Asscher-cut ring to mark their five-year anniversary. For their engagement, Burton presented Taylor with an 18.61-carat emerald and diamond pendant made by Bulgari. The pendant detached from its necklace and could double as a brooch. Explore a large selection of diamond rings on 1stDibs.