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12 Carat Oval Diamond

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TYPE IIA Golconda GIA Certified 12 Carat Oval Diamond Platinum Solitaire Ring
By Antinori Fine Jewels
Located in Rome, IT
diamond, certified by GIA, and boasting an impressive 12 carats. Crafted to perfection and set in
Category

2010s Contemporary Solitaire Rings

Materials

Diamond, Platinum

TYPE IIA Golconda type GIA Certified 12 Carat Oval Diamond Pave Ring
By Antinori Fine Jewels
Located in Rome, IT
12 carat GIA Certified D Color Internally Flawless Clarity Oval cut diamond is set in a handcrafted
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

Vivid DIamonds GIA Certified 12.10 Carat Oval Cut Diamond Eternity Band
By Vivid Diamonds
Located in Miami, FL
Certified oval diamonds weighing 12.10 carats total, D-F color, VVS-VS clarity. Each diamond was carefully
Category

21st Century and Contemporary American Modern Band Rings

Materials

Diamond, Platinum

2.49 Carat Oval Blue Sapphire Round Diamond Hasbani 18Kt Halo Engagement Ring
By Hasbani Diamonds
Located in London, GB
Sapphire: 1.95 Carat Diamond: 0.54 Carat (total weight 12 stones) Band Width: 2 mm Head Width: 13x12mm
Category

2010s British Modern Engagement Rings

Materials

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

3.46 Carat Oval Blue Sapphire Round Diamond Hasbani 18Kt Halo Engagement Ring
By Hasbani Diamonds
Located in London, GB
surrounded by a claw set diamond halo With a total diamond weight of 0.99 carat white colour G, clarity VS
Category

2010s British Modern Engagement Rings

Materials

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

11 Carat Oval Tanzanite and 12 Carat Diamonds Necklace 18 Karat Gold Estate
Located in New York, NY
This extraordinary Necklace is consist of 7 Fine oval Tanzanite weighing approximately 11 Carats
Category

20th Century Drop Necklaces

Materials

Diamond, Tanzanite, 18k Gold

12 Carat Oval Cut Diamond Engagement Ring GIA Certified F IF
Located in New York, NY
MACY OVAL HALO DIAMOND ENGAGEMENT RING PLATINUM BY MIKE NEKTA GIA CERTIFIED Center Diamond Carat
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Oval 12 Carat Treated Ruby and 1 Carat Diamond 14 Karat Yellow Gold Ring
Located in New York, NY
16 X11 Oval Cut Approximately 12.28 Carat Treated Ruby 14 Karat Yellow Gold Ring Size 6
Category

2010s Solitaire Rings

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

Vintage Natural Oval Amethyst & Old Euro Diamond Halo Ring Platinum 12 Carat
Located in Carmel-by-the-Sea, CA
: Natural Amethyst Shape: Oval Brilliant Weight: 12 Carats Color: Medium purple violet Clarity: Eye Clean
Category

Vintage 1950s More Rings

Materials

Amethyst, Diamond, Yellow Gold, Platinum

Important Oval Emerald Ring With Diamond Double Halo 12 Carats 18K Gold
Located in Laguna Niguel, CA
Carat Diamonds = 5.27 Carats Metal: 18K Gold Ring Size: 7* US *It can be resized complimentary
Category

21st Century and Contemporary Contemporary Cocktail Rings

Materials

Diamond, White Diamond, Emerald, Gold, 18k Gold, White Gold, Yellow Gold

Important Oval Emerald Ring With Diamond Double Halo 12 Carats 18K Gold
Located in Laguna Niguel, CA
Carat Diamonds = 5.27 Carats Metal: 18K Gold Ring Size: 7* US *It can be resized complimentary
Category

21st Century and Contemporary Contemporary Cocktail Rings

Materials

Emerald, White Diamond, Diamond, Yellow Gold, White Gold, 18k Gold, Gold

Important Oval Emerald Ring With Diamond Double Halo 12 Carats 18K Gold
Located in Laguna Niguel, CA
Carat Diamonds = 5.27 Carats Metal: 18K Gold Ring Size: 7* US *It can be resized complimentary
Category

21st Century and Contemporary Contemporary Cocktail Rings

Materials

Diamond, White Diamond, Emerald, Gold, 18k Gold, White Gold, Yellow Gold

Important Oval Emerald Ring With Diamond Double Halo 12 Carats 18K Gold
Located in Laguna Niguel, CA
Carat Diamonds = 5.27 Carats Metal: 18K Gold Ring Size: 7* US *It can be resized complimentary
Category

21st Century and Contemporary Contemporary Cocktail Rings

Materials

Diamond, White Diamond, Emerald, Gold, 18k Gold, White Gold, Yellow Gold

13 Carats Ruby Oval Cabochon 14kt Gold 12 Full Cut Round Diamonds Cocktail Ring
By Tutti Frutti Jewellery
Located in Bangkok, TH
13 Carats Natural Ruby oval cabochon ( 11 mm. x 15 mm.) set with 3,7 grams of 14 kt white gold, 12
Category

2010s Thai Contemporary Cocktail Rings

Materials

Diamond, Ruby, Gold, 14k Gold

12 Carat Pink Sapphire Diamond Cocktail Ring 18k
By Antinori Fine Jewels
Located in Rome, IT
Brilliant Cut diamonds, totaling approximately 0.51 carats. The diamonds exhibit G-H color and VS-SI clarity
Category

2010s Italian Modern Engagement Rings

Materials

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

2 carats oval emerald and diamonds ring from 1960
Located in PARIS, FR
Stones: 1 oval emerald of 2 carats, 6 shuttle diamonds: 0.40 carat, 12 round diamonds: 0.60 carat
Category

Vintage 1960s Wedding Rings

Materials

Diamond, Emerald, 18k Gold

1.02 Carat Oval Diamond Halo Gold Engagement Ring
Located in Stamford, CT
Oval diamond halo engagement ring in a solid 14k yellow gold setting, with a white gold top set
Category

Late 20th Century Engagement Rings

Materials

Diamond, 14k Gold, Yellow Gold, Gold

12 Carat Treated Ruby & 2.8 Carat Diamond Tennis Bracelet 14 Kt Yellow Gold
Located in New York, NY
12 Carat Treated Ruby & 2.8 Carat Diamond Tennis Bracelet 14 Kt Yellow Gold This exceptionally
Category

2010s Tennis Bracelets

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

12 Carat Natural Emerald & 2.8 Carat Diamond Tennis Bracelet 14 Kt Yellow Gold
Located in New York, NY
12 Carat Natural Emerald & 2.8 Carat Diamond Tennis Bracelet 14 Kt Yellow Gold This exceptionally
Category

2010s Tennis Bracelets

Materials

Diamond, Emerald, Yellow Gold, 14k Gold

5.89 Carat Natural Oval Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
5.89ct Oval brilliant cut white sapphire and diamond engagement ring. In a handmade platinum
Category

Late 20th Century Engagement Rings

Materials

Diamond, Sapphire, Platinum

1.7 carat oval ring
Located in Dublin, IE
: Oval Surface Finish: Polished Estimated Set Diamond Weight: 2 CT Selling Unit of Measure: EA Primary
Category

2010s Irish Modern Solitaire Rings

Materials

Diamond, 14k Gold, White Gold

1.7 carat oval ring
1.7 carat oval ring
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18 Karat White Gold Sapphire Diamond Floral Drop Day & Night Earring 2.45 Carats
By Harbor Diamonds
Located in New York, NY
brilliants in a floral motif weighing 1 carats and two white South Sea Pearls measuring 12-13 MM. Earrings
Category

2010s Contemporary Drop Earrings

Materials

Diamond, Sapphire, White Gold

Peter Suchy .58 Carat Oval Diamond Halo Platinum Slide Pendant Necklace
By Peter Suchy
Located in Stamford, CT
, this platinum domed pendant has a .49ct oval bezel set center diamond, accented with a halo of 12 round
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Platinum

Diamond Ruby 1.66ct Cluster Earrings Round Oval Studs Modern 18 Karat White Gold
By Hasbani Diamonds
Located in London, GB
Graceful and striking 1.66 Carat total ruby and diamond Cluster earrings, The brilliant oval ruby
Category

2010s British Modern Stud Earrings

Materials

Sapphire, Pink Sapphire, Green Sapphire, Tanzanite, Tiger's Eye, Topaz, ...

.65 Carat Oval Emerald Diamond Gold Cluster Engagement Ring
Located in Stamford, CT
Emerald and diamond engagement ring. .65cts center oval emerald with triangle of 6 clustered
Category

Vintage 1970s Engagement Rings

Materials

Diamond, Emerald, 14k Gold, Yellow Gold, Gold

1.12 Carat Oval Ruby Diamond Halo Cluster Gold Pendant
Located in Stamford, CT
18k white gold vintage style Ruby and Diamond pendant. Oval Ruby sits center surrounded by 2 rows
Category

Early 20th Century Necklace Enhancers

Materials

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

GIA Certified 1.12 Carat Oval Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
Vintage 1940's Natural 1.12 carat oval bright orange/pink sapphire and diamond engagement ring. Set
Category

Early 20th Century Engagement Rings

Materials

Diamond, Sapphire, Pink Sapphire, Platinum

VINTAGE BROWN AND WHITE DIAMOND RING (4, 12 Carats)
Located in Uccle, BE
Unique Ring made of white gold 18 Kt. Ring set with a center brown diamond sert with a oval shape
Category

Late 20th Century European Cocktail Rings

Materials

White Diamond, Brown Diamond, Gold, 18k Gold

12 Carat Natural Ruby 3.5 Carat Diamond Cluster Ring
Located in Bay Harbor Islands, FL
Ruby ring set with an oval ruby weighing approximately 12 carats, and 2 pear shape rubies weighing
Category

Vintage 1940s Cocktail Rings

Materials

Diamond, Ruby, 18k Gold

GIA Burma Heated Ruby 7.71 Carat Oval in Diamond Platinum Ring
Located in La Jolla, CA
GIA Burma Heated Ruby 7.71 Carat Oval in Diamond Platinum Ring Ruby and Diamond Ring features a
Category

21st Century and Contemporary American Cocktail Rings

Materials

Diamond, Ruby, Platinum

13.36 Carat Oval and Round Diamond 18 Karat Gold Tennis Bracelet
By Claris-A
Located in Monte Carlo, MC
: Total weight of diamonds : 13.36 carat as follows: 12 oval cut diamonds: 8.99 carat ( colour I-J
Category

21st Century and Contemporary Contemporary Tennis Bracelets

Materials

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

9.60 Carat Oval Light Yellow Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
1950’s oval faint yellow sapphire an diamond engagement ring. Very light yellow oval Sapphire
Category

Mid-20th Century Engagement Rings

Materials

Diamond, Yellow Sapphire, Sapphire, Platinum

12 Carat Cabochon Emerald Diamond Clip Earrings 14 Karat Yellow Gold, Estate
Located in New York, NY
12 Carat Cabochon Emerald Diamond Clip Earrings 14 Karat Yellow Gold, Estate This exquisite pair
Category

1990s Stud Earrings

Materials

Diamond, Emerald, 14k Gold

GIA Certified 1.57 Carat Oval Tanzanite Diamond Gold Engagement Ring
Located in Stamford, CT
Tanzanite and Diamond halo engagement ring. Oval shaped violet blue Tanzanite set in 14k yellow
Category

21st Century and Contemporary Engagement Rings

Materials

Tanzanite, Diamond, Gold, Yellow Gold, 14k Gold

168.00 Carats Pink & Peach Opal and Diamond Gold Necklace
By Diamond Stars Jewelry, Inc.
Located in New York, NY
Diamonds G SI. There are 168.00 Carats in Peach & Pink Natural There are 12 Oval Cabochon Pink & Peach
Category

21st Century and Contemporary Chinese Modern Link Necklaces

Materials

Diamond, White Diamond, Opal, Gold, 18k Gold, Rose Gold

Peter Suchy GIA Certified Oval 2.50 Carat Sapphire Diamond Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Crisp and bright sapphire and diamond in a classic pendant necklace. A stunning 2.50 Carat oval
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Sapphire, Blue Sapphire, Gold, 14k Gold, White Gold

12 Carat Natural Sapphire & Diamond Cocktail Tennis Bracelet 14 Kt Yellow Gold
Located in New York, NY
spaced by two diamonds . Total weight of the Sapphire is approximately 15 carat. Total number of diamonds
Category

2010s Tennis Bracelets

Materials

Diamond, Sapphire, Gold, 14k Gold, Yellow Gold

14K White Gold 2.47 Carat Oval Green Tourmaline Halo Diamond Ring
Located in San Francisco, CA
This ring features an oval-shaped light, vibrant green color 2.47-carat Tourmaline encircled by
Category

21st Century and Contemporary American Cocktail Rings

Materials

Diamond, Tourmaline, 14k Gold, White Gold

Tahitian Pearl Diamond Drop Earrings 0.57 Carat 18 Karat White Gold
By Harbor Diamonds
Located in New York, NY
upon request. Diamond Height: 11/16" Diamond Oval Width: 3/8"
Category

2010s American Contemporary Drop Earrings

Materials

Diamond, Pearl, White Gold

Vintage Diamond Pearl Drop Earrings 4.50 Carats 18 Karat White Gold
By Harbor Diamonds
Located in New York, NY
4.50 carats and two oval shape pearls measuring 12 mm. Very Dramatic!!
Category

Vintage 1950s American Drop Earrings

Materials

Diamond, Pearl, White Gold

1.75 Carat Oval Cut Tanzanite Diamond 14 Karat Yellow Gold Ring
By Roshe Jewels
Located in Los Angeles, CA
weighs 1.35 carats and is adorned with 12 Round Cut Diamonds that weigh 0.40 carats. It is set in 14
Category

21st Century and Contemporary American Modern Cocktail Rings

Materials

Tanzanite, Diamond, 14k Gold, Yellow Gold

Ovals Sapphires and South Sea Pearls Dangle Drop Earrings 18k White Gold
By Harbor Diamonds
Located in New York, NY
18K White gold drop earrings featuring 6 oval Sapphires weighing 3.00 carats and two 11-12 mm South
Category

21st Century and Contemporary American Contemporary Dangle Earrings

Materials

Diamond, Blue Sapphire, South Sea Pearl, Sapphire, 18k Gold

3.1 Carat Oval Blue Sapphire and Diamond Ring in Platinum
Located in London, GB
This spectacular ring features an oval cut 3.1 carat Blue Sapphire at its centre, surrounded by an
Category

21st Century and Contemporary Cluster Rings

Materials

Diamond, Blue Sapphire, Platinum

5.22 Carat Natural FIY Oval Modified Brilliant Diamond GIA VVS2 Engagement Ring
By SCARSELLI
Located in New York, NY
5.22 carat Fancy Intense Yellow natural, GIA certified oval-cut diamond engagement ring on a yellow
Category

2010s American Contemporary Engagement Rings

Materials

Yellow Diamond, Diamond, Yellow Gold, 18k Gold

GRS Certified Oval Ruby 7.02 carat and Diamond Halo Cocktail Ring in Platinum
Located in La Jolla, CA
12 Marquise Diamonds. Weight of diamonds is 3.00 carats in total. Ring size is 6. Ring top measures
Category

21st Century and Contemporary American Cocktail Rings

Materials

Diamond, Ruby, Platinum

GIA Certified 2.11 Carat Oval Sapphire Diamond Halo White Gold Engagement Ring
Located in Stamford, CT
This stunning oval 2.11ct sapphire is mounted in a 14k white gold setting. Accented by a halo of 12
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Sapphire, Gold, 14k Gold, White Gold

3.48 Carat Oval Rubelite & Diamond Ring In 18k Yellow Gold
Located in Chicago, IL
, accented by 12 round-cut diamonds with a total weight of 1.7 carats. The combination of the vibrant
Category

2010s American Contemporary Fashion Rings

Materials

Diamond, Rubelite, 18k Gold, Yellow Gold

12 Carat Cushion Cut Natural Pink Tourmaline & Diamond 14 Karat Yellow Gold Ring
Located in New York, NY
Approximately 12 Carat Cushion Cut Natural Pink Tourmaline & Diamond 14 Karat Yellow Gold Ring 12
Category

2010s Cocktail Rings

Materials

Tourmaline, Diamond, 14k Gold, Yellow Gold

Ruby 1.29 Ct Cluster Pendant 18 Kt White Gold Round Brilliant 0.60 Carat Diamond
By Hasbani Diamonds
Located in London, GB
Ruby Cluster Pendant, The radiant red oval shaped ruby in the center is surrounded by 12 round
Category

2010s British Modern Pendant Necklaces

Materials

Tourmaline, Ruby, Sapphire, Blue Sapphire, Pink Sapphire, Yellow Sapphir...

South Sea Golden Pearl Diamond Drop Earrings 0.57 Carat 18 Karat Yellow Gold
By Harbor Diamonds
Located in New York, NY
Pearls upon request. Diamond Height: 11/16" Diamond Oval Width: 3/8"
Category

2010s American Contemporary Drop Earrings

Materials

Diamond, Pearl, Yellow Gold

18 Karat Gold Ring with 5.12 Carat Oval Blue Sapphire with 1.27 Carat Diamonds
By Cellini
Located in New York, NY
, this iconic style remains timeless. Oval Sapphire =5.12 carats 12 Diamonds = 1.27 carats Stamped 18k
Category

2010s Contemporary Engagement Rings

Materials

Diamond, Blue Sapphire, 18k Gold, White Gold

Spark GIA Certified .50 Carat Oval Ruby Diamond Halo Gold Pendant Necklace
By Spark Creations
Located in Stamford, CT
oval red Ruby, heated, approx. total weight .50cts, GIA certificate #1172882581 12 round diamonds
Category

Early 2000s Pendant Necklaces

Materials

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

12 Carat Blue Topaz Oval Cut Fashion Pendant in 14k Yellow Gold
Located in Chicago, IL
Reminiscent of a bright blue sky, this is a gorgeous Swiss blue topaz oval shape pendant. A 12.00
Category

2010s American Contemporary Fashion Rings

Materials

Diamond, Topaz, Blue Topaz, Yellow Gold

3.37 Carats Total Oval Cut Half Green Emerald & Diamond Eternity Wedding Band
By Roman Malakov
Located in New York, NY
emerald weighing 1.69 carats total and 10 brilliant oval cut diamonds weighing 1.68 carats total, set in a
Category

21st Century and Contemporary American Contemporary Wedding Rings

Materials

Diamond, Emerald, 18k Gold, Yellow Gold

12 Carat Emerald Cabochon Diamond Gold Cocktail Earrings
Located in New York, NY
Pair of 18k white gold cocktail earrings, set each with an approx. 5 carats oval emerald cabochon
Category

20th Century More Earrings

Materials

Diamond, Emerald, 18k Gold

Emerald and Diamond Ring Oval Shape Emerald 3.44 Carat and Mix Shapes Diamonds
Located in Brooklyn, NY
Fancy Emerald with Mix shaped Diamonds, Pear, Round & Marquise. Emerald is 3.44 carat / 12 x 8.5
Category

2010s Thai Cocktail Rings

Materials

Diamond, Emerald, 18k Gold

Roman Malakov 1.50 Carats Oval Cut Ruby with Diamond Floral Engagement Ring
By Roman Malakov
Located in New York, NY
with 12 sparkling diamonds. Diamonds weigh 0.75 carats total. Made in 18K white gold composition with a
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Ruby, Diamond, 18k Gold, White Gold

Princess Diana Inspired 3.55 Carat Oval Sapphire and Diamond Ring 14k White Gold
Located in New York, NY
Princess Diana Style 3.55 Carat Natural Diamond and Sapphire Oval Ring G SI 14K White Gold 100
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Sapphire, White Gold

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12 Carat Oval Diamond For Sale on 1stDibs

You are likely to find exactly the 12 carat oval diamond 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. You can easily find a 1498 antique edition and 2283 modern creations to choose from as well. Finding the perfect 12 carat oval diamond 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. There have been many well-made iterations of the classic 12 carat oval diamond over the years, but those made by Alberto, Roshe Jewels and DGI are often thought to be among the most beautiful. A 12 carat oval diamond can make for a versatile accessory, but a selection from our variety of 2931 diamond versions can add an especially stylish touch. An oval cut version of this piece has appeal, but there are also round cut and mixed cut versions for sale. There aren’t many items for men if you’re seeking a 12 carat oval diamond, as most of the options available are for women and unisex.

How Much is a 12 Carat Oval Diamond?

The price for a 12 carat oval diamond starts at $1 and tops out at $2,699,999 with these rings, on average, selling for $4,780.
Questions About 12 Carat Oval Diamond
  • 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.
  • 1stDibs ExpertAugust 24, 2021
    A 2 carat oval diamond is approximately 10.23mm × 6.82mm × 4.16mm in size. These diamonds usually have an approximate face-up area of 57.21 mm². Find a variety of diamonds on 1stDibs.