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CAROL ACKERMAN Eight .12 Ct Diamonds Surrounding Gold Carved Leaf Wedding Ring
Located in Kennebunkport, ME
CT diamonds. The polished interior displays her imprint " © CA 18K". The ring is size 6.5. Carol
Category

21st Century and Contemporary American Modern Band Rings

Materials

Diamond, Gold, 18k Gold, Yellow Gold

AIG Certified 32.00 Ct Tanzanite 15.00 Ct Emerald 12 Ct Diamonds Brooch/Pendant
Located in Massafra, IT
with a centre Natural Zambian Emerald in perfect oval cut of 15,00 carat, fine quality, and 12 pieces
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Emerald, Tanzanite, 18k Gold

14 Karat White Gold and Diamond Ring
Located in Washington Depot, CT
total diamond weight: .12 ct. Diamond color: G Diamond clarity: SI1 Ring Size: 6.5 Weight: 3.0 dwt
Category

20th Century Cocktail Rings

Materials

Diamond, White Gold

35 Carat Natural Coral and 12 Carat DeBeers Diamond Cocktail Earring in Platinum
Located in New York, NY
35 Ct Natural Coral And 12 Ct Diamond Cocktail Earring 18 Karat White Gold Coral Natural , Very
Category

Early 20th Century Stud Earrings

Materials

Diamond, Coral, Platinum

18 Karat Yellow Gold and Diamond Dolphin Charm
Located in Washington Depot, CT
diamond weight: .12 ct. Diamond color: G Diamond clarity: SI1-I1 Size: 20 mm x 10 mm Weight: 0.9
Category

20th Century Pendant Necklaces

Materials

Diamond, Yellow Gold

18 Karat Yellow Gold and Diamond Dolphin Charm
18 Karat Yellow Gold and Diamond Dolphin Charm
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W 0.4 in L 0.79 in
14 Karat White Gold Diamond Stud Earrings #16154
Located in Washington Depot, CT
weight: .12 ct. Diamond color: G Diamond clarity: SI1 Size: 7 mm Weight: 0.9 gr./ 0.5 dwt. Very
Category

20th Century Stud Earrings

Materials

White Diamond, Gold, 14k Gold, White Gold

14 Karat Yellow Gold Diamond Cross Pendant
Located in Washington Depot, CT
brilliant cut diamonds set in classic 14K yellow gold. Approximate total diamond weight: .12 ct. Diamond
Category

20th Century Pendant Necklaces

Materials

Diamond, Yellow Gold

14 Karat Yellow Gold and Diamond Band Ring
Located in Washington Depot, CT
weight: .12 ct. Diamond clarity: SI1-I1 Diamond color: H-I Ring Size: 5.5 Weight: 1.0 dwt. / 1.6 gr
Category

20th Century Band Rings

Materials

Diamond, Yellow Gold

14 Karat Yellow Gold Emerald and Diamond Ring
Located in Washington Depot, CT
. Approximate total diamond weight: .12 ct. Diamond clarity: SI1 Diamond color: H Ring Size: 5.25 Weight
Category

20th Century Band Rings

Materials

Diamond, Emerald, Yellow Gold

14 Karat White Gold Pink Glass and Diamond Ring
Located in Washington Depot, CT
gold. Shank: 2 mm. Total diamond weight: .12 ct. Diamond color: G-H Diamond clarity: SI-I Ring
Category

20th Century Cocktail Rings

Materials

Diamond, White Gold

14 Karat Yellow Gold Citrine and Diamond Ring
Located in Washington Depot, CT
. Width: 7 mm. Shank: 4 mm. Total citrine weight: 1.20 ct. Total diamond weight: .12 ct. Diamond
Category

20th Century Fashion Rings

Materials

Citrine, Diamond, 14k Gold, Yellow Gold

14K White Gold Grey Cabochon Star Sapphire Diamond Ring Size 6.25 #16957
Located in Washington Depot, CT
weight: .12 CT. Diamond color: G Diamond clarity: SI Ring Size: 6.25 Weight: 2.8 dwt. / 4.4 gr
Category

21st Century and Contemporary Engagement Rings

Materials

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

14 Karat Yellow and White Gold Diamond Arrow Mesh Ring Size 8.25 #17091
Located in Washington Depot, CT
diamond weight: .12 ct. Diamond color: G Diamond clarity: VS Ring Size: 8.25 Tested 14K gold. Weight
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, 14k Gold, Yellow Gold

18 Karat Yellow Gold Ruby and Diamond Ring
Located in Washington Depot, CT
weight: 1.18 ct. Total diamond weight: .12 ct. Diamond color: H Diamond clarity: VS2 Size: 4.75
Category

20th Century Fashion Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

18 Karat Yellow Gold Natural Sapphire and Diamond Ring
Located in Washington Depot, CT
: 2 mm. Approximate total diamond weight: .12 ct. Diamond clarity: VS1 Diamond color: G Ring Size
Category

20th Century Cocktail Rings

Materials

Diamond, Sapphire, Yellow Gold

14 Karat Yellow Gold Amethyst and Diamond Ring GAI Certified
Located in Washington Depot, CT
. Width: 8 mm. Shank: 3 mm. Amethyst weight: 3.60 ct. Total diamond weight: .12 ct. Diamond color: I
Category

20th Century Cocktail Rings

Materials

Amethyst, Diamond, Yellow Gold

Vintage 14 Karat White Gold and Diamond Cross Pendant Necklace
Located in Washington Depot, CT
. Approximate total diamond weight: .12 ct. Diamond color: I Diamond clarity: I3 Size: Cross: 13 mm x 8 mm
Category

20th Century Pendant Necklaces

Materials

Diamond, White Gold

14 Karat Yellow Gold Natural Sapphire and Diamond Ring
Located in Washington Depot, CT
ring measures 10 mm x 8 mm. Shank measures 2 mm. Approximate total diamond weight: .12 ct. Diamond
Category

20th Century Fashion Rings

Materials

Diamond, Sapphire, Yellow Gold

10 Karat White Gold Natural Sapphire and Diamond Ring
Located in Washington Depot, CT
. Shank: 2 mm. Approximate total diamond weight: .12 ct. Diamond color: J-K Diamond clarity: I1-I2
Category

20th Century Fashion Rings

Materials

Diamond, Sapphire, 10k Gold, White Gold

14 Karat Yellow Gold and Diamond Cameo Brooch or Pendant
Located in Washington Depot, CT
diamond weight: .12 ct. Diamond color: J Diamond clarity: I1 Size: 47 mm x 42 mm Weight: 10.1 dwt
Category

20th Century Brooches

Materials

Diamond, Yellow Gold

14 Karat Yellow Gold Emerald and Diamond Ring Size 7 #15631
Located in Washington Depot, CT
. Approximate total diamond weight: .12 ct. Diamond clarity: I1 Diamond color: I Ring Size: 7 Tested 14K
Category

Late 20th Century Engagement Rings

Materials

Diamond, Emerald, 14k Gold, Yellow Gold

18K WG Sapphire Diamond Heart Ring Size 9 #15379
Located in Washington Depot, CT
: .12 ct. Diamond clarity: VS1-VS2 Diamond color: G-H Ring size: 9 Stamped: 750 Weight: 5.6 gr
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Sapphire, 18k Gold, White Gold

14 Karat White Gold Pink Tourmaline and Diamond Ring #13768
Located in Washington Depot, CT
classic 14K white gold. Shank: 2 mm. Tourmaline weight: 2.86 ct. Total diamond weight: .12 ct. Diamond
Category

20th Century Cocktail Rings

Materials

Diamond, Tourmaline, White Gold

14K White Gold Emerald and Diamond Ring Size 4.5 #15787
Located in Washington Depot, CT
white gold. Shank: 1.4 mm. Emerald weight: 1.71 ct. Total diamond weight: .12 ct. Diamond clarity
Category

20th Century Engagement Rings

Materials

Diamond, Emerald, 14k Gold, White Gold

14 Karat Yellow Gold Purple Sapphire and Diamond Tear Drop Earrings
Located in Washington Depot, CT
yellow gold. Push back closures. Approximate total diamond weight: .12 ct. Diamond color: H-I Diamond
Category

20th Century Drop Earrings

Materials

Diamond, Purple Sapphire, Yellow Gold

14 Karat White Gold Diamond and Natural Pink Sapphire Ombre Pendant
Located in Washington Depot, CT
beautifully crafted 14K white gold. Total sapphire weight: 2.10 cts. Total diamond weight: .12 ct. Diamond
Category

20th Century Pendant Necklaces

Materials

Diamond, Pink Sapphire, White Gold

18K Yellow and White Gold Sapphire and Diamond Dangle Earrings #15261
Located in Washington Depot, CT
beautifully detailed 18K yellow and white gold.   Total sapphire weight: .48 ct. Total diamond weight: .12
Category

20th Century Dangle Earrings

Materials

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

14 Karat White Gold Citrine, Diamond and Sapphire Ring #13913
Located in Washington Depot, CT
: 5.44 ct. Total sapphire weight: 3.0 ct. Total diamond weight: .12 ct. Diamond color: H-I Diamond
Category

20th Century Cocktail Rings

Materials

Citrine, Diamond, Sapphire, White Gold

Blue Sapphire Earring with Diamond Halo Around Pear Sapphire in White Gold
By Five Star Jewelry
Located in Austin, TX
Total Weight: .12 ct Diamond Clarity: VS2 (excellent, eye clean) Diamond Color: G (excellent, near
Category

21st Century and Contemporary American Contemporary Stud Earrings

Materials

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

Platinum Earrings with 12 Ct. Sapphires & 1.3 Ct Diamonds
Located in Antwerp, BE
, triangle cut : 12 Carats Diamonds: 22 brilliant cut diamonds together approx. 1.3 ct diamonds Material
Category

20th Century European Artisan Dangle Earrings

Materials

Diamond, Sapphire, Platinum

Platinum Earrings with 12 Ct. Sapphires & 1.3 Ct Diamonds
Platinum Earrings with 12 Ct. Sapphires & 1.3 Ct Diamonds
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W 0.51 in D 0.15 in L 1.8 in
12 Carat Natural Marquise Ruby and Diamond Tennis Bracelet 14 Karat Yellow Gold
Located in New York, NY
. Natural Rubies 56 Pieces approximately 12 Ct Diamonds 56 pieces approximately 0.75ct Please look at all
Category

2010s Tennis Bracelets

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

Vintage Opal Diamond Cocktail Ring 12 Ct Opal 4 Ct Diamond
Located in Kendal, GB
) STONES: Natural Opal (12 x 21mm, approx. 12ct), Diamonds (4 x 4mm, approx. 0.25ct each – 4ct total
Category

Vintage 1960s European Cocktail Rings

Materials

Diamond, Opal, 18k Gold, White Gold

Four Prong 12 Ct TW Natural Diamond Tennis Bracelet
Located in Dubai, DU
Diamond. Fasten with a secure clasp. METAL DETAILS: 18K White Gold DIAMOND DETAILS: Natural, Ethically
Category

2010s Tennis Bracelets

Materials

Diamond, 18k Gold

12 Ct Natural Trillion Tanzanite & 0.50 Ct Diamond Tennis Bracelet 14 KW Gold
Located in New York, NY
trillion tanzanites weighing approximately 12 carats, it exudes elegance. Complementing the tanzanites are
Category

2010s Tennis Bracelets

Materials

Diamond, Tanzanite, 14k Gold, White Gold

18 Karat & Silver Brooch Set with 1 Diamond 1.76 Ct+12 Ruby 3.76 Ct + 48 Diamond
Located in Heerlen, NL
: 1.76 ct. VS2 /I 12 natural Ruby's mixed round cut: 3.76 ct. 48 old European Cut & Rose Cut Diamonds
Category

Antique Late 19th Century French Neoclassical Brooches

Materials

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

12 Ct Natural Emerald Zambia Cabochon & 4 Ct Diamond Stud Earring 14 KW Gold
Located in New York, NY
Approximately 12 Carat of Natural Zambian Emerald Cabochon and 4 Ct diamonds earrings in White
Category

2010s Stud Earrings

Materials

Diamond, Emerald, 14k Gold, White 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

Chalcedony, Turquoise, Citrine, Other, Diamond, White Diamond, Emerald, ...

Vintage 12 Ct Natural Carved Emerald & 1.5 Ct Diamond Ring 18 Kt Yellow Gold
Located in New York, NY
approximately 12 ct with beautiful color and clarity. Accompanied by brilliant cut diamonds approximately 1.5 ct
Category

Early 2000s Solitaire Rings

Materials

Diamond, Emerald, 14k Gold, Yellow Gold

ct 45, 50 Blue Topaz Diamond and ct 12, 88 Sapphire Gold Ring
Located in Marcianise, Marcianise (CE)
blue topaz surrounded by a diamonds oval stripe and a crown of blue sapphire. diamonds 0.36kt topaz
Category

Late 20th Century Italian Retro Cocktail Rings

Materials

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

ct 12, 53 Sapphire Diamond Gold and Silver Ring
Located in Marcianise, Marcianise (CE)
, embellished with diamonds on the first circle and blue sapphires and topaz in the centre. diamonds(0.73Kt
Category

Late 20th Century Italian Retro Cluster Rings

Materials

Diamond, Blue Sapphire, Topaz, 9k Gold, Silver

12 Ct Antique Platinum Brooch
Located in Chicago, IL
This antique brooch features round, marquise, and baguette shape diamonds weighing approximately 12
Category

Vintage 1920s Brooches

Materials

Platinum

Natural 12 Ct Burma Ruby & 30 Ct Diamond Trio Pin 18 Karat Yellow Gold 78gm
Located in New York, NY
Introducing the exquisite Natural 12 Ct Burma Ruby & 30 Ct Diamond Trio Pin, a truly unique piece
Category

Vintage 1970s Choker Necklaces

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Checkerboard Amethyst Drop & Diamond Pendent/Necklace 14 Karat Yellow Gold Chain
Located in New York, NY
Approximately 12 Ct Checkerboard Amethyst Drop & Diamond Pendent/Necklace 14 Karat Yellow Gold
Category

2010s Pendant Necklaces

Materials

Diamond, Amethyst, Gold, 14k Gold, Yellow Gold

12 Ct Unheated Ceylon Sapphire Cabochon Ring with Diamonds, Paperwork Incl.
Located in New York, NY
An approximate 12 ct. Unheated Ceylon Sapphire Cabochon Ring with Diamonds with a certificate from
Category

20th Century Cluster Rings

Materials

Diamond, Sapphire, 14k Gold, White Gold

12 Ct Natural Marquis Ruby & 0.75 Ct Diamond 18 Kt White Gold Ball Ring Size 6
Located in New York, NY
12 Ct Natural Marquis Ruby & 0.75 Ct Diamond 18 Kt White Gold Ball Ring Size 6 Introducing our
Category

2010s Solitaire Rings

Materials

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

Edwardian 12 MM. Natural Split Pearl 1.60 Ct Diamond Engagement Ring
Located in Napoli, IT
water ¾ split pearl of 12 mm. in diameter – 17 old mine cut diamonds totalling approx 1.60 Ct (G/H-VVS
Category

Antique Early 1900s European Edwardian Engagement Rings

Materials

Diamond, Pearl, Platinum, 18k Gold

Chantecler 12 Ct Sapphire 22 Ct Diamond VS/E-F Color Ring & Earring Set 18 KYG
By Chantecler
Located in New York, NY
Designer Chantecler From Italy 12 Ct Sapphire Cabochon And 22 Ct VS/E-F Color Diamond Ring
Category

20th Century Stud Earrings

Materials

Diamond, Blue Sapphire, Sapphire, 18k Gold

Ravishing 18k Yellow Gold Bracelet w/ 12 ct Natural Diamond IGI Certificate
Located in רמת גן, IL
A luxurious gold tennis bracelet with ideal cut round brilliant diamonds in 12-carat round
Category

2010s Israeli Tennis Bracelets

Materials

Diamond, 18k Gold, Yellow Gold

18K White Gold Heart Diamond Tennis Bracelet '12 1/2 Ct. tw'
Located in San Francisco, CA
Gemstone Color: WHITE Center Gemstone Shape: HEART Center Diamond Carat Weight: 12 Metal: 18K White Gold
Category

21st Century and Contemporary American More Bracelets

Materials

Diamond, White Gold

Magnificent Ct 12, 85 of Zambia Emeralds and Diamonds on Earrings
Located in Massafra, IT
brilliant cut diamonds 4,33 ct F/VS-VVS . Handmade fine Jewels by artisan goldsmith. Excellent manufacture
Category

21st Century and Contemporary Stud Earrings

Materials

18k Gold

Timeless Treasure:18kt White Gold Brooch with 12 ct Burmese Rubies and Diamonds
Located in Lugano, CH
16 stunning Burmese rubies. This 18kt white gold brooch, paired with 1.38 ct of sparkling diamonds
Category

21st Century and Contemporary Italian Contemporary Brooches

Materials

Diamond, Ruby, White Gold

Pair of Natural Black Diamond 12, 7 Ct. Cubes/Dices with Gold Inlay
Located in Antwerp, BE
Pair of natural 12,7 Carat black diamond cubes/dice with gold inlay The dice are inlaid with gold
Category

20th Century Artisan More Jewelry

Materials

Black Diamond, Gold

Art Deco Platinum & Diamond Encrusted Pin/Fur Clips 12 CT / VS Quality Estate
Located in New York, NY
An absolutely exquisite platinum and diamond pin/fur clips from the Art Deco era! This wonderful
Category

Vintage 1960s Brooches

Materials

Diamond, Platinum

Round Locket Pendant Necklace 18k White Gold Purple Enamel 12 Diamonds 0.19 ct
By Victor Mayer
Located in Pforzheim, DE
vitreous enamel, 12 diamonds, total 0.19 ct G VS, brilliant cut About the creator Victor Mayer Victor
Category

21st Century and Contemporary German Art Deco Pendant Necklaces

Materials

Diamond, White Gold, 18k Gold, Enamel

Round Locket Pendant - 18k Yellow Gold - Blue Enamel - 12 Diamonds 0.19 ct GVS
By Victor Mayer
Located in Pforzheim, DE
vitreous enamel, 12 diamonds, total 0.19 ct G VS, brilliant cut About the creator Victor Mayer Victor
Category

2010s German Art Nouveau Pendant Necklaces

Materials

Diamond, Yellow Gold, Enamel, 18k Gold

Round Locket Pendant 18k White Gold Purple Vitreous Enamel 12 Diamonds 0.19 ct
By Victor Mayer
Located in Pforzheim, DE
vitreous enamel, 12 diamonds, total 0.19 ct G VS, brilliant cut About the creator Victor Mayer Victor
Category

21st Century and Contemporary German Art Deco Pendant Necklaces

Materials

Diamond, 18k Gold, Enamel, White Gold

12 Ct Natural Emerald Zambia Cabochon & Diamond Stud Earring 14 Karat White Gold
Located in New York, NY
Approximately 12 Carat of Natural Zambian Emerald Cabochon earrings in White gold Each Emerald
Category

2010s Stud Earrings

Materials

Diamond, Emerald, 14k Gold, White Gold

Amazing Flower Design Ct 7, 12 of Diamonds and Ruby on Ring
Located in Massafra, IT
From flowers collection, gorgeous design in 14k gold with baguettes cut diamonds ct 4,82 H/SI and
Category

21st Century and Contemporary Cocktail Rings

Materials

14k Gold

12 Ct. SI/HI Pear Diamond Crescent Moon Chandelier Earrings 18 Karat White Gold
Located in IN
Wt. :- 12.30 Ct. ( AVERAGE DIAMOND CLARITY SI1-SI2 & COLOR H-I ) Earrings Size :- 62 mm approx
Category

21st Century and Contemporary Indian Modern Chandelier Earrings

Materials

Diamond, 18k Gold, White Gold

Oval Locket Pendant Necklace 18k Yellow Gold Blue Enamel 12 Diamonds 0.08 ct GVS
By Victor Mayer
Located in Pforzheim, DE
, translucent peacock blue vitreous enamel, gold paillons, 12 diamonds, total 0.08 ct, G VS, brilliant cut
Category

21st Century and Contemporary German Contemporary Pendant Necklaces

Materials

Diamond, 18k Gold, Yellow Gold, Enamel

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12 Ct Diamond For Sale on 1stDibs

On 1stDibs, you can find the most appropriate 12 ct diamond for your needs in our varied inventory. Frequently made of Gold, 18k Gold and White Gold, this item was constructed with great care. In our selection of items, you can find a vintage example as well as a contemporary version. You’re likely to find the perfect 12 ct diamond among the distinctive items we have available, which includes versions made as long ago as the 19th Century as well as those produced as recently as the 21st Century. There have been many well-made iterations of the classic 12 ct diamond over the years, but those made by LB Exclusive, Renata Bernard and David Jerome are often thought to be among the most beautiful. Today, if you’re looking for a round cut version of this piece and are unable to find the perfect match, our selection also includes oval cut and cabochon alternatives. There aren’t many items for men if you’re seeking a 12 ct diamond, as most of the options available are for women and unisex.

How Much is a 12 Ct Diamond?

On average, a 12 ct diamond at 1stDibs sells for $6,900, while they’re typically $390 on the low end and $1,300,000 for the highest priced versions of this item.
Questions About 12 Ct 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.