12 Carat
2010s Brooches
Diamond, Platinum
Vintage 1940s Unknown More Necklaces
Diamond, Yellow Diamond, Platinum
2010s Italian Cocktail Rings
Diamond, Yellow Diamond
20th Century French More Bracelets
Diamond, Platinum
Vintage 1940s Cocktail Rings
Diamond, Ruby, 18k Gold
2010s Italian Cocktail Rings
Diamond, Yellow Diamond, 18k Gold, Yellow Gold, Platinum
Vintage 1930s Unknown Art Deco Band Rings
White Diamond, 18k Gold, White Gold
21st Century and Contemporary American Hoop Earrings
Diamond, White Gold
2010s Italian Modern Engagement Rings
Diamond, White Diamond, Emerald, Platinum
2010s Italian Modern Tennis Bracelets
Diamond, White Diamond, White Gold
Vintage 1970s French Retro Cocktail Rings
Amethyst, 18k Gold, Yellow Gold
21st Century and Contemporary Contemporary Band Rings
Purple Sapphire, Green Sapphire, Pink Sapphire, Blue Sapphire, Sapphire,...
21st Century and Contemporary Contemporary Band Rings
Diamond, Sapphire, Blue Sapphire, Pink Sapphire, Green Sapphire, Purple ...
21st Century and Contemporary Contemporary Band Rings
Diamond, Sapphire, Blue Sapphire, Pink Sapphire, Green Sapphire, Purple ...
21st Century and Contemporary Contemporary Band Rings
Diamond, Sapphire, Blue Sapphire, Pink Sapphire, Green Sapphire, Purple ...
2010s Unknown Modern Bridal Rings
Diamond, White Diamond, Platinum
1990s Stud Earrings
Diamond, Emerald, 14k Gold
Mid-20th Century Modern Cocktail Rings
Citrine, 18k Gold, Yellow Gold
2010s Italian Modern Cocktail Rings
Diamond, White Diamond, Ruby, Platinum
Antique 19th Century Italian Romantic Dangle Earrings
2010s Italian Modern Engagement Rings
Diamond, White Diamond, Platinum
2010s Contemporary Clip-on Earrings
Diamond, Platinum
20th Century American Modern Brooches
Diamond, 18k Gold, Yellow Gold, Platinum
21st Century and Contemporary Contemporary Cocktail Rings
Coral, Diamond, Platinum
2010s Contemporary Solitaire Rings
Diamond, Platinum
21st Century and Contemporary American Modern More Necklaces
Diamond, 14k Gold
21st Century and Contemporary Tennis Bracelets
Diamond, 14k Gold, White Gold
Early 20th Century Stud Earrings
Diamond, South Sea Pearl, 18k Gold
2010s Unknown Contemporary Engagement Rings
Diamond, White Diamond, Emerald, Platinum
2010s American Link Bracelets
Diamond, Gold, 14k Gold
20th Century American Modern Tennis Bracelets
Diamond, Platinum
Vintage 1950s More Rings
Amethyst, Diamond, Yellow Gold, Platinum
Early 2000s American Modern Pendant Necklaces
Diamond, 18k Gold, Yellow Gold, Enamel
Vintage 1970s Unknown Retro Stud Earrings
Topaz, Gold
2010s Italian Modern Chain Necklaces
Diamond, White Diamond, 18k Gold, White Gold
21st Century and Contemporary Modern Cocktail Rings
Chalcedony, Diamond, 18k Gold, Yellow Gold
Late 20th Century American Modern More Earrings
14k Gold
2010s Tennis Bracelets
Diamond, Ruby, 14k Gold, Yellow Gold
2010s Tennis Bracelets
Diamond, Emerald, Yellow Gold, 14k Gold
Early 20th Century Stud Earrings
Diamond, Coral, Platinum
Vintage 1970s Link Bracelets
Diamond, Tanzanite, 18k Gold, Yellow Gold
21st Century and Contemporary Italian Contemporary Cocktail Rings
Moonstone, Sterling Silver
2010s American Contemporary Hoop Earrings
Ruby, Gold, 14k Gold, Yellow Gold
21st Century and Contemporary Three-Stone Rings
Yellow Diamond, 18k Gold, Platinum
2010s Italian Modern More Necklaces
Diamond, 14k Gold
21st Century and Contemporary Modern Pendant Necklaces
Diamond, Sapphire, Gold, 14k Gold, White Gold, Platinum
Late 20th Century More Necklaces
Diamond, Pearl, Gold, 18k Gold, White Gold
Vintage 1960s Stud Earrings
Diamond, 18k Gold
20th Century North American Artist Cocktail Rings
Chalcedony, Quartz, Sapphire, 14k Gold
Mid-20th Century Retro Cocktail Rings
Diamond, Aquamarine, 14k Gold, Yellow Gold
21st Century and Contemporary Art Deco Link Bracelets
Diamond, Ruby, Gold, 18k Gold, White Gold
Vintage 1940s American Retro Stud Earrings
Aquamarine, Diamond, Ruby, 14k Gold
21st Century and Contemporary Canadian Contemporary Cocktail Rings
Diamond, Tanzanite, 14k Gold
Antique Late 19th Century Victorian Dangle Earrings
Diamond, 18k Gold, Yellow Gold
21st Century and Contemporary Italian Contemporary More Necklaces
White Diamond, Diamond, 18k Gold, White Gold
2010s American Contemporary More Necklaces
Diamond, 14k Gold
Early 20th Century American Art Deco Link Bracelets
Diamond, Platinum
2010s Cocktail Rings
Tourmaline, Diamond, 14k Gold, Yellow Gold
2010s Italian Modern Engagement Rings
Diamond, White Diamond, Pink Sapphire, 18k Gold, White Gold
21st Century and Contemporary American Modern Three-Stone Rings
Diamond, Platinum
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12 Carat For Sale on 1stDibs
How Much is a 12 Carat?
- 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.