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12 Carat Round Diamond Ring

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2.49 Carat Oval Blue Sapphire Round Diamond Hasbani 18Kt Halo Engagement Ring
By Hasbani Diamonds
Located in London, GB
0.54 carat diamonds white colour G, clarity VS / SI round brilliant cut diamonds. This Ring has been
Category

2010s British Modern Engagement Rings

Materials

Diamond, White Diamond, Blue Sapphire, Gold, 18k Gold, White Gold

3.46 Carat Oval Blue Sapphire Round Diamond Hasbani 18Kt Halo Engagement Ring
By Hasbani Diamonds
Located in London, GB
/ SI round brilliant cut diamonds. This Ring has been beautifully set in 18 Karat Gold with white
Category

2010s British Modern Engagement Rings

Materials

Diamond, White Diamond, Blue Sapphire, Gold, 18k Gold, White Gold

12 Carats Round Brilliant Diamond Engagement Ring Certified I VVS1 IGI Report
Located in New York, NY
Earth Mined Center Diamond: Carat Weight: 10.02 Carats Color: I* Clarity: VVS1 Style: Round
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

12 Carat Round Cut Diamond Engagement Ring GIA Certified E IF
Located in New York, NY
SAMATHA ROUND DIAMOND ENGAGEMENT RING IN 18K WHITE GOLD BY MIKE NEKTA GIA CERTIFIED Center
Category

2010s American Engagement Rings

Materials

Diamond, 18k Gold, White Gold

Vivid Diamonds 1.31 Carat Diamond Bypass Ring
By Vivid Diamonds
Located in Miami, FL
Stunning Vivid Diamonds diamond bypass ring crafted in platinum, featuring 12 round brilliant cut
Category

21st Century and Contemporary American Modern Band Rings

Materials

Diamond, Platinum

Elegant 0.72 Carat Round Diamond Ring
Located in רמת גן, IL
carat cut: Round Brilliant color: D clarity: VVS2 cut grade: EX 12 diamond side stones of total: 0.1
Category

2010s Israeli Solitaire Rings

Materials

Diamond, 18k Gold, White Gold

.12 Carat Diamond Rose Gold Wedding Band Ring
Located in Stamford, CT
full cut diamonds. 6 round full cut Diamonds, approx. total weight .12cts, G, VS2 Size 6.75 – sizable
Category

21st Century and Contemporary Wedding Rings

Materials

Diamond, Gold, 14k Gold, Rose Gold

1 carat emerald and 12 diamonds ring from 1920
Located in PARIS, FR
Stones: 1 carat emerald and 12 diamonds: 0.44ct Material: Platinum Dimensions: Diameter of 12mm
Category

Vintage 1920s Art Deco Wedding Rings

Materials

Diamond, Emerald, Platinum

12 Carat Pink Sapphire Diamond Cocktail Ring 18k
By Antinori Fine Jewels
Located in Rome, IT
This exquisite Cocktail/Statement Ring in 18k White Gold showcases a total weight of 12.14 carats
Category

2010s Italian Modern Engagement Rings

Materials

Pink Sapphire, White Diamond, Diamond, White Gold, 18k Gold

18 Karat Tahitian Pearl South Sea Diamond Fashion Ring 0.50 Carats
By Harbor Diamonds
Located in New York, NY
18 Karat white gold fashion ring featuring one Tahitian pearl measuring 12 MM and one South Sea
Category

2010s Contemporary Fashion Rings

Materials

Diamond, Pearl, South Sea Pearl, White Gold

South Sea & Golden Pearl Diamond Fashion Ring 0.50 Carats 18K Gold
By Harbor Diamonds
Located in New York, NY
18 karat yellow gold fashion ring featuring one Golden Pearl measuring 12 mm and one South Sea
Category

2010s Contemporary Fashion Rings

Materials

Diamond, Pearl, South Sea Pearl, 18k Gold

Belais .12 Carat Diamond Art Deco Gold Engagement Ring
Located in Stamford, CT
Belais diamond engagement ring. 18k white gold original Art Deco circa 1920s with highly detailed
Category

Early 20th Century Engagement Rings

Materials

Diamond, Gold, 14k Gold, White Gold

6. 12 Carat Tanzanite Diamond Cocktail Ring
By Mehnaz Durrani
Located in Richmond, BC
Stunning tanzanite diamond cocktail ring. Violet-blue, high luster, pear faceted, 6.12 carats
Category

21st Century and Contemporary Canadian Contemporary Cocktail Rings

Materials

Diamond, Tanzanite, 14k Gold

South Sea Pearl Diamond Halo Ring 0.32 Carat 18 Karat Rose Gold
By Harbor Diamonds
Located in New York, NY
brilliants weighing 0.32 carats. Color G-H Clarity SI Measurements: South Sea Pearl: 12-13 MM Diamond Halo
Category

2010s American Contemporary Cocktail Rings

Materials

Diamond, South Sea Pearl, Rose Gold

18 Karat White Gold South Sea Pearl Diamond X Ring 0.76 Carats
By Harbor Diamonds
Located in New York, NY
18 Karat White gold fashion X design ring featuring one white South Sea Pearl measuring 11-12 MM
Category

2010s Contemporary Fashion Rings

Materials

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

Vivid Diamonds AGL Certified 5.91 Carat Burma No Heat Sapphire & Diamond Ring
By Vivid Diamonds
Located in Miami, FL
encircled by 12 round brilliant-cut diamonds with a combined weight of approximately 2 carats, H-I color
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Sapphire, Diamond, White Gold, 18k Gold

GIA Certified 1.01 Carat Round Brilliant Diamond Engagement Ring
Located in Beverly Hills, CA
-cut diamond. The ring is adorned with six round diamonds on each side of the center stone, this ring
Category

21st Century and Contemporary Unknown Contemporary Engagement Rings

Materials

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

Natural Diamond Ring 0.85 carats 18KT White Gold 5 Round Solitaire Diamond Ring
Located in Antwerpen, BE
Embark on a journey of enhanced splendor with this Italian Handmade 5 Round Cut Engagement Ring
Category

2010s Belgian Modern Engagement Rings

Materials

Diamond, 18k Gold, White Gold

Art Deco .54 Carats Round Baguette Diamond Platinum Band Ring
Located in Stamford, CT
1940's Vintage late Art Deco diamond band ring. 12 full cut diamonds in four rows of three
Category

Early 20th Century Band Rings

Materials

Diamond, Platinum

4 carat Round Engagement Ring Mounting
Located in Dublin, IE
Primary Stone Size: 4.5 carat Primary Stone Shape: Round Estimated Set Diamond Weight: 4 1/5 CTW Primary
Category

2010s Irish Modern Engagement Rings

Materials

White Diamond, Platinum

13 Carats Ruby Oval Cabochon 14kt Gold 12 Full Cut Round Diamonds Cocktail Ring
By Tutti Frutti Jewellery
Located in Bangkok, TH
round full cut diamonds of 0,05 ct. each = 0,6 carats total diamonds weight Ring Shank American size # 7
Category

2010s Thai Contemporary Cocktail Rings

Materials

Diamond, Ruby, Gold, 14k Gold

Art Deco 12 Carat Sapphire Diamond Gold Ring
Located in Napoli, Italy
amazing rare vivid 12,24 carat Natural Ceylon Sapphire cushion-shape, surrounded by 0,70 carats of round
Category

Vintage 1970s Italian Art Deco Cocktail Rings

Materials

Diamond, Blue Sapphire, 18k Gold

GRS Certified 12 Carat NO HEAT Burmese Ruby Oval Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
diamonds in a handmade platinum setting Ruby total weight 12 carats Diamond total weight 1 carats Ring size
Category

2010s Italian Modern Cocktail Rings

Materials

Ruby, White Diamond, Diamond, Platinum

14K White Gold 4 CTW Round Baguette Diamond Cluster Ring Size 12
Located in South Bend, IN
Baguette Diamond Cluster Ring in Size 12. Crafted for those with discerning taste, this ring is a
Category

Early 2000s Cocktail Rings

Materials

Diamond, White Gold

GIA Certified 3.50 Carat Royal Blue Sapphire Round Cut Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
Prong-set Royal Gem framed by 12 Round diamonds and diamonds on the shank weighing approx. 1.60ct, F-G
Category

2010s Italian Modern Solitaire Rings

Materials

Diamond, Blue Sapphire

0.40 Carat Round Brilliant Cut 7 Baguette Diamond White Gold Engagement Ring 7
By H & H Jewels
Located in Miami, FL
0.40 Carat Round Brilliant Cut 7 Baguette Diamond White Gold Engagement Ring This is a handmade
Category

2010s Engagement Rings

Materials

Diamond, 14k Gold, White Gold

14k Yellow Gold 1.85 Carat Salt & Pepper Round Shape Diamond Ring
Located in San Francisco, CA
This 14k yellow gold ring features a 1.85 Carat Round shape Natural Salt & Pepper diamond set in
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, 14k Gold, Yellow Gold

EGL Certified 0.70 Carat Round Diamond 18K White Gold Ring Set
Located in San Francisco, CA
This Pre-owned 18K White gold ring set features the main ring with ten(10) Brilliant round diamonds
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, 18k Gold, White Gold

Peter Suchy .88 Carat Round Tourmaline Diamond White Gold Engagement Ring
By Peter Suchy
Located in Stamford, CT
Round tourmaline and diamond white gold engagement ring. The center piece of this ring features a
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Tourmaline, Gold, 18k Gold, White Gold

TYPE IIA Golconda type GIA Certified 12 Carat Oval Diamond Pave Ring
By Antinori Fine Jewels
Located in Rome, IT
Antinori di Sanpietro ROMA platinum ring. The 12 carat center diamond is accented by an exquisite pave of
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

18 carat yellow gold solitaire round brillant cut diamond ring
Located in Monte-Carlo, MC
18 carat yellow gold solitaire ring designed with 1 round brillant cut diamond weighing 0.34 carat
Category

2010s Solitaire Rings

Materials

Diamond, Yellow Gold

12 Carat Internally Flawless Diamond Engagement Ring GIA Certified E Color
Located in New York, NY
SAMATHA ROUND CUT DIAMOND ENGAGEMENT RING IN 18K WHITE GOLD BY MIKE NEKTA GIA CERTIFIED Center
Category

2010s American Engagement Rings

Materials

Diamond, 18k Gold, White Gold

Fancy Yellow Diamond Eternity Ring, Huge Dome 18 Karat Gold Ring 12 Carat
Located in Honolulu, HI
Fancy intense & vivid yellow Diamond ring. This magnificent ring features 476 round brilliant cut
Category

21st Century and Contemporary American Modern Dome Rings

Materials

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

HARBOR D. Three-Stone Illusion Ring 0.57 Carat 18 Karat White Gold
By Harbor Diamonds
Located in New York, NY
18K White gold illusion ring featuring 12 round brilliants weighing 0.09 carats and 15 baguette
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, White Gold

Vintage 1950s 2.10 Carat Round Diamond Ring with Sapphires and Diamonds
Located in Boston, MA
Vintage 2.10ct European Cut Round Diamond Ring from the 1950’s. The diamond is a K color and VS2
Category

Vintage 1950s American Modern Cocktail Rings

Materials

Diamond, Sapphire, Platinum

GIA Certified 1.12 Carats Total Round Cut Diamond Solitaire Engagement Ring
By Roman Malakov
Located in New York, NY
This ring features a round brilliant diamond weighing 1.12 carats that GIA certified as G color SI1
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, 18k Gold, White Gold

8.52 Carat '70pt each' Round Brilliant Diamond Eternity Ring Band
By GEMME
Located in New York, NY
This beautiful Eternity Ring is set with 12 perfectly matched Round Brilliant Cut Diamonds, each
Category

2010s American Contemporary Band Rings

Materials

Diamond, Platinum

8.60 Carat '70pt each' Round Brilliant Diamond Eternity Ring Band
By GEMME
Located in New York, NY
This beautiful Eternity Ring is set with 12 perfectly matched Round Brilliant Cut Diamonds, each
Category

2010s American Contemporary Band Rings

Materials

Diamond, Platinum

Sophisticated Round Brilliant Pave Diamond Ring
Located in רמת גן, IL
The Sophisticated Round Brilliant Pave Diamond Ring exudes elegance and refinement, making it the
Category

2010s Singaporean Band Rings

Materials

Diamond, 18k Gold, White Gold

Aquamarine Diamond Halo Ring, 14 Karat White Gold, 1.29 Carat Aqua .12 Diamond
By Five Star Jewelry
Located in Austin, TX
Gold Diamond Carat Weight: .12 Carats Diamond Shape: Round Diamond Clarity: VS2 (Excellent, Eye Clean
Category

2010s American Modern Fashion Rings

Materials

Diamond, Aquamarine, White Gold, Gold, 14k Gold

0.48 Carat Round Brilliant Diamond and 18K Yellow Gold Knot Cocktail Ring
Located in Chevy Chase, MD
knot, with Diamonds set in the loops of 18k yellow gold. There are 12 Diamonds set throughout the ring
Category

Late 20th Century American Retro Cocktail Rings

Materials

Diamond, Yellow Gold

1 Carat Diamond Engagement Ring, White Gold, Round, Vintage, Detailed
By Five Star Jewelry
Located in Austin, TX
Diamond Weight: .92 Carats Side Diamond: .12 Carats Main Diamond Shape: Round Brilliant Ring Size: 6
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, 14k Gold, White Gold, Gold

3.78 Carat Round Brilliant 12 Diamond 3/4 Wedding Band 14 Karat In Stock
Located in Boca Raton, FL
14k White Gold 3.78ctw Round Brilliant 12 Diamond 3/4 Wedding Band Style: Women's Round Brilliant
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Gold, 14k Gold, White Gold

Brilliant Cut 0.90 Carats Diamond 'GIA Cert' and 12 Diamonds Engagement Ring
Located in MELBOURNE, VIC
Hand made 18 carat White Gold Engagement Ring Claw set with one Round Brilliant Cut diamond, Weight
Category

2010s Australian Contemporary Engagement Rings

Materials

Diamond, 18k Gold, White Gold

Scarselli 12 Carat Fancy Intense Yellow Heart Shape Diamond VS1 Ring GIA
By SCARSELLI
Located in New York, NY
From SCARSELLI this ring has a Huge Sunny Heart. This 12.20 carat Fancy Intense Yellow Heart shape
Category

2010s American Contemporary Cocktail Rings

Materials

Yellow Diamond, 18k Gold

14K Yellow Gold Organic Round Salt and Pepper Diamond Ring 'Center: 1.28 Carat'
Located in San Francisco, CA
on its crown gallery. In the center of the ring is set 1.28 Carat Salt and Pepper round diamond. If
Category

21st Century and Contemporary American Solitaire Rings

Materials

Diamond, 14k Gold, Yellow Gold

1.20 Carat Baguette and Round Cut Diamonds Men's Ring
Located in New York, NY
Finely crafted in 18k yellow gold with 4 Baguette and 12 Round brilliant cut diamonds weighing
Category

Vintage 1980s More Rings

Materials

Diamond, 18k Gold

1.40 Carat Round Diamond Halo 18 Karat White Gold Engagement Ring
Located in Sherman Oaks, CA
One electronically tested 18k White Gold Ladies Cast Diamond Unity Ring Condition is very good
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, 18k Gold

3.05 Carat Diamond and Palladium Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
engraved date '15/12/53' and the palladium hallmark (Pl950). This diamond cluster ring is supplied with an
Category

Antique Early 1900s Unknown Cocktail Rings

Materials

Diamond, Palladium

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
Category

Vintage 1960s Unknown Cocktail Rings

Materials

Diamond, White Gold

Emerald Cut 1.20 carat D VVS2 GIA Platinum Ring with 12 Diamonds 0.42 carat
Located in Miami, FL
Diamond Emerald Cut VVS2 clarity Stone and 12 amazing round diamonds (0.42 carats) to complement. This
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Emerald, Platinum

12 Carat Emerald Cut Diamond Engagement Ring GIA Certified E VVS1
Located in New York, NY
GIA CERTIFIED Center Diamond: Carat Weight: 10.40 Carats Color : E* Clarity: VVS1 Style: Emerald
Category

2010s American Engagement Rings

Materials

Diamond, White Gold, 18k Gold

2.50 Carat Total Weight Platinum Ring With Round, Marquise, And Baguette Diamond
Located in Naples, FL
This ring has3 rows of diamonds 7 round brilliant diamonds .75 carats, 6 marquise cut diamonds .81
Category

Late 20th Century Unknown Art Deco Cocktail Rings

Materials

Diamond, Platinum

GIA Certified 8.40 Carat '70pt each' Round Brilliant Diamond Eternity Ring Band
By GEMME
Located in New York, NY
This beautiful Eternity Ring is set with 12 perfectly matched Round Brilliant Cut Diamonds, each
Category

2010s American Contemporary Band Rings

Materials

Diamond, Platinum

Platinum Diamond Eternity Ring 8.50 Carats
By Belfiore Jewelry
Located in Great Neck, NY
weighs approximately 0.75 carats. The ring is set with 12 stones. The total weight is 8.54 carats. The
Category

21st Century and Contemporary American Modern Wedding Rings

Materials

Diamond, Platinum

Blue Sapphire and Diamond Heart Ring
By Diamond Scene New York
Located in New York, NY
.21 carats of blue sapphire .35 carats of whire diamonds set in 18k white gold The heart is just
Category

21st Century and Contemporary Fashion Rings

Materials

Diamond, Blue Sapphire

2.00 Carat Natural Round Diamonds Fold over Ring Mod Deco 14 Karat
Located in New York, NY
Foldover Ring 2ct Round Diamond Bead Set ring Diamonds: Vs-2 clarity, G color. Depth of ring
Category

2010s American Cluster Rings

Materials

Diamond, 14k Gold, White Gold

18 Karat White Gold Halo Round Diamond Ring 'Center, 2.00 Carat G-SI2 EGL USA'
Located in San Francisco, CA
This stunning ring features a Heart and Arrows 2.00 -Carat round diamond G in color, SI2 in Clarity
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, White Gold

Tiffany & Co. Round Circlet 0.64 Carat G VS Diamond Engagement Ring in Platinum
By Tiffany & Co.
Located in San Diego, CA
: 6 - sizable Total Carat Weight: 0.64 TCW Diamond Shape: Round Brilliant Hallmark: " ©Tiffany
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

3.35 Carat Men's 3 Row Round Diamond Ring 14 Karat in Stock
Located in Boca Raton, FL
14k White Gold 3.35ctw Men's 3 Row Round Diamond Ring Raymond Lee Jewelers in Boca Raton — South
Category

21st Century and Contemporary American Wedding Rings

Materials

Diamond, Gold, 14k Gold, White Gold

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12 Carat Round Diamond Ring For Sale on 1stDibs

Surely you’ll find the exact 12 carat round diamond ring you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Every item for sale was constructed with extraordinary care, often using Gold, White Gold and 9k Gold. Our collection of these items for sale includes 42 vintage editions and 173 modern creations to choose from as well. Making the right choice when shopping for a 12 carat round diamond ring may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 19th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. As it relates to this specific piece, our collection includes designs that are universally popular, but .5 Carat and 1 Carat carat weights, specifically, are sought with frequency. Finding an appealing 12 carat round diamond ring — no matter the origin — is easy, but By Design Jewelers, LB Exclusive and Tiffany & Co. each produced a popular version that is worth a look. A round cut version of this piece has appeal, but there are also oval cut and brilliant cut versions for sale. Finding a 12 carat round diamond ring for sale for women should be easy, but there are 54 pieces available to browse for unisex as well as men, too.

How Much is a 12 Carat Round Diamond Ring?

On average, a 12 carat round diamond ring at 1stDibs sells for $2,995, while they’re typically $285 on the low end and $1,050,000 for the highest priced versions of this item.

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 ringsvintage 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.