12 Ct Diamond
21st Century and Contemporary American Modern Band Rings
Diamond, Gold, 18k Gold, Yellow Gold
21st Century and Contemporary Pendant Necklaces
Diamond, Emerald, Tanzanite, 18k Gold
20th Century Cocktail Rings
Diamond, White Gold
Early 20th Century Stud Earrings
Diamond, Coral, Platinum
20th Century Pendant Necklaces
Diamond, Yellow Gold
20th Century Stud Earrings
White Diamond, Gold, 14k Gold, White Gold
20th Century Pendant Necklaces
Diamond, Yellow Gold
20th Century Band Rings
Diamond, Yellow Gold
20th Century Band Rings
Diamond, Emerald, Yellow Gold
20th Century Cocktail Rings
Diamond, White Gold
20th Century Fashion Rings
Citrine, Diamond, 14k Gold, Yellow Gold
21st Century and Contemporary Engagement Rings
White Diamond, Blue Sapphire, Gold, 14k Gold, White Gold
21st Century and Contemporary Engagement Rings
Diamond, 14k Gold, Yellow Gold
20th Century Fashion Rings
Diamond, Ruby, 18k Gold, Yellow Gold
20th Century Cocktail Rings
Diamond, Sapphire, Yellow Gold
20th Century Cocktail Rings
Amethyst, Diamond, Yellow Gold
20th Century Pendant Necklaces
Diamond, White Gold
20th Century Fashion Rings
Diamond, Sapphire, Yellow Gold
20th Century Fashion Rings
Diamond, Sapphire, 10k Gold, White Gold
20th Century Brooches
Diamond, Yellow Gold
Late 20th Century Engagement Rings
Diamond, Emerald, 14k Gold, Yellow Gold
21st Century and Contemporary Engagement Rings
Diamond, Sapphire, 18k Gold, White Gold
20th Century Cocktail Rings
Diamond, Tourmaline, White Gold
20th Century Engagement Rings
Diamond, Emerald, 14k Gold, White Gold
20th Century Drop Earrings
Diamond, Purple Sapphire, Yellow Gold
20th Century Pendant Necklaces
Diamond, Pink Sapphire, White Gold
20th Century Dangle Earrings
White Diamond, Blue Sapphire, Gold, 18k Gold, White Gold, Yellow Gold
20th Century Cocktail Rings
Citrine, Diamond, Sapphire, White Gold
21st Century and Contemporary American Contemporary Stud Earrings
Blue Sapphire, Diamond, Sapphire, 14k Gold, White Gold
20th Century European Artisan Dangle Earrings
Diamond, Sapphire, Platinum
2010s Tennis Bracelets
Diamond, Ruby, 14k Gold, Yellow Gold
Vintage 1960s European Cocktail Rings
Diamond, Opal, 18k Gold, White Gold
2010s Tennis Bracelets
Diamond, 18k Gold
2010s Tennis Bracelets
Diamond, Tanzanite, 14k Gold, White Gold
Antique Late 19th Century French Neoclassical Brooches
Diamond, Ruby, 18k Gold, Rose Gold, Silver
2010s Stud Earrings
Diamond, Emerald, 14k Gold, White Gold
2010s British Modern Pendant Necklaces
Chalcedony, Turquoise, Citrine, Other, Diamond, White Diamond, Emerald, ...
Early 2000s Solitaire Rings
Diamond, Emerald, 14k Gold, Yellow Gold
Late 20th Century Italian Retro Cocktail Rings
Topaz, Blue Sapphire, Diamond, Yellow Gold, White Gold, 14k Gold
Late 20th Century Italian Retro Cluster Rings
Diamond, Blue Sapphire, Topaz, 9k Gold, Silver
Vintage 1920s Brooches
Platinum
Vintage 1970s Choker Necklaces
Diamond, Ruby, 18k Gold, Yellow Gold
2010s Pendant Necklaces
Diamond, Amethyst, Gold, 14k Gold, Yellow Gold
20th Century Cluster Rings
Diamond, Sapphire, 14k Gold, White Gold
2010s Solitaire Rings
Diamond, Ruby, Gold, 18k Gold, White Gold
Antique Early 1900s European Edwardian Engagement Rings
Diamond, Pearl, Platinum, 18k Gold
20th Century Stud Earrings
Diamond, Blue Sapphire, Sapphire, 18k Gold
2010s Israeli Tennis Bracelets
Diamond, 18k Gold, Yellow Gold
21st Century and Contemporary American More Bracelets
Diamond, White Gold
21st Century and Contemporary Stud Earrings
18k Gold
21st Century and Contemporary Italian Contemporary Brooches
Diamond, Ruby, White Gold
20th Century Artisan More Jewelry
Black Diamond, Gold
Vintage 1960s Brooches
Diamond, Platinum
21st Century and Contemporary German Art Deco Pendant Necklaces
Diamond, White Gold, 18k Gold, Enamel
2010s German Art Nouveau Pendant Necklaces
Diamond, Yellow Gold, Enamel, 18k Gold
21st Century and Contemporary German Art Deco Pendant Necklaces
Diamond, 18k Gold, Enamel, White Gold
2010s Stud Earrings
Diamond, Emerald, 14k Gold, White Gold
21st Century and Contemporary Cocktail Rings
14k Gold
21st Century and Contemporary Indian Modern Chandelier Earrings
Diamond, 18k Gold, White Gold
21st Century and Contemporary German Contemporary Pendant Necklaces
Diamond, 18k Gold, Yellow Gold, Enamel
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12 Ct Diamond For Sale on 1stDibs
How Much is a 12 Ct Diamond?
- How big is a 12 carat diamond?1 Answer1stDibs ExpertFebruary 22, 2021The size of a 12 carat diamond is dependent on diamond cut. A 12 carat round diamond is roughly 15 mm in size.