12 Carat Pear Diamond
2010s Italian Modern Pendant Necklaces
Diamond, White Diamond, Emerald, Platinum
2010s American Contemporary Tennis Bracelets
Ruby, Diamond, 14k Gold, White Gold
21st Century and Contemporary Indian Modern Drop Necklaces
Yellow Diamond, 18k Gold
21st Century and Contemporary Indian Modern Drop Necklaces
Yellow Diamond, 18k Gold
21st Century and Contemporary Canadian Contemporary Cocktail Rings
Diamond, Tanzanite, 14k Gold
21st Century and Contemporary Indian Modern Drop Necklaces
Yellow Diamond, 18k Gold
21st Century and Contemporary Indian Modern Drop Necklaces
Yellow Diamond, 18k Gold
2010s American Modern Fashion Rings
Aquamarine, Diamond, Gold, 14k Gold, White Gold
2010s American Contemporary Stud Earrings
Diamond, Yellow Diamond, 18k Gold, Platinum
21st Century and Contemporary Art Deco Engagement Rings
Diamond, Blue Sapphire, Platinum
Early 2000s Drop Necklaces
Diamond, Emerald, 14k Gold
Vintage 1980s Unknown Contemporary Three-Stone Rings
Diamond, Ruby, Gold, 18k Gold, Yellow Gold
2010s Modern Engagement Rings
Diamond, Sapphire, Purple Sapphire, Platinum
Recent Sales
2010s American Contemporary Modern Bracelets
Diamond, White Gold
21st Century and Contemporary Singaporean Art Deco Drop Earrings
Diamond, Blue Diamond, Yellow Diamond, Pink Diamond, Gold, 14k Gold, 18k...
2010s American Modern Lever-Back Earrings
White Diamond, Emerald, 18k Gold, White Gold
2010s American Modern Pendant Necklaces
Diamond, Platinum
2010s American Modern Dangle Earrings
Diamond, Platinum
Vintage 1980s Unknown Modern Pendant Necklaces
Diamond, Platinum
21st Century and Contemporary Modern Pendant Necklaces
Diamond, Opal, Gold, White Gold
2010s American Engagement Rings
Diamond, Black Diamond, 14k Gold, White Gold
2010s Pendant Necklaces
Diamond, Rubelite, 14k Gold
Mid-20th Century Contemporary Pendant Necklaces
White Diamond, Yellow Diamond, 18k Gold
21st Century and Contemporary Choker Necklaces
Diamond, Blue Sapphire, Platinum
Vintage 1970s American Modern Dangle Earrings
Diamond, Platinum
2010s American Contemporary More Rings
Diamond, 18k Gold, White Gold
2010s Art Deco Cocktail Rings
Diamond, Emerald, 18k Gold
21st Century and Contemporary American Artisan Dangle Earrings
Diamond, White Diamond, 18k Gold, White Gold
Early 2000s Dangle Earrings
Diamond, Emerald, Gold, 18k Gold
21st Century and Contemporary Italian Art Deco Choker Necklaces
Sapphire, Emerald, Amethyst, Diamond, Citrine, Yellow Gold, 18k Gold
21st Century and Contemporary American Modern Pendant Necklaces
Diamond, White Diamond, 18k Gold, White Gold
2010s Hong Kong Contemporary Stud Earrings
Diamond, White Diamond, 18k Gold, White Gold
Late 20th Century More Rings
Chrysoberyl, Diamond, White Diamond, Platinum
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21st Century and Contemporary Swiss Wrist Watches
Diamond, Sapphire, Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green ...
20th Century French Modern Link Bracelets
Diamond, Sapphire, Gold, 18k Gold, Yellow Gold, Platinum
20th Century Swiss Wrist Watches
Diamond, Yellow Gold
2010s French Shoulder Bags
2010s French Structured Shoulder Bags
2010s French Structured Shoulder Bags
21st Century and Contemporary Choker Necklaces
Diamond, Yellow Diamond
21st Century and Contemporary Drop Necklaces
Diamond, Platinum
21st Century and Contemporary Dangle Earrings
Diamond, White Gold, Platinum
Antique 1890s Brooches
21st Century and Contemporary French Top Handle Bags
21st Century and Contemporary French Top Handle Bags
21st Century and Contemporary French Top Handle Bags
21st Century and Contemporary French Top Handle Bags
2010s Swiss Wrist Watches
Stainless Steel
2010s French Tote Bags
12 Carat Pear Diamond For Sale on 1stDibs
How Much is a 12 Carat Pear Diamond?
The Legacy of Diamond in Jewelry Design
Antique diamond rings, diamond tiaras and dazzling vintage diamond earrings are on the wish lists of every lover of fine jewelry. And diamonds and diamond jewelry are primarily associated with storybook engagements and red-carpet grand entrances — indeed, this ultra-cherished gemstone has a dramatic history on its hands.
From “A Diamond Is Forever” to “Diamonds Are a Girl’s Best Friend,” pop culture has ingrained in our minds that diamonds are the most desired, the most lasting and the most valuable gemstone. But what makes the diamond so special? Each stone — whether it’s rubies, sapphires or another stone — is unique and important in its own right. April babies might claim diamonds for themselves, but just about everyone wants this kind of sparkle in their lives!
There are several factors that set diamonds apart from other stones, and these points are important to our gem education.
Diamonds are minerals. They are made up of almost entirely of carbon (carbon comprises 99.95 percent; the remainder consists of various trace elements). Diamonds are the hardest gemstones, ranking number 10 on the Mohs Hardness Scale. Even its name, diamond, is rooted in the Greek adamas, or unconquerable. The only object that can scratch a diamond is another diamond. Diamonds are formed deep within the earth at very high temperatures (1,652–2,372 degrees Fahrenheit at depths between 90 and 120 miles beneath the earth’s surface) and are carried up by volcanic activity. Diamonds are quite rare, according to the Gemological Institute of America, and only 30 percent of all the diamonds mined in the world are gem quality.
In the 1950s, the Gemological Institute of America developed the 4Cs grading system to classify diamonds: clarity, color, cut and carat weight. Not all diamonds are created equal (there are diamonds, and then there are diamonds). The value of the diamond depends on the clarity (flawless diamonds are very rare but a diamond's value decreases if there are many blemishes or inclusions), color (the less color the higher the grade), cut (how the diamond’s facets catch the light, certain cuts of diamonds show off the stone better than others) and carat weight (the bigger, the better).
When you start shopping for a diamond engagement ring, always prioritize the cut, which plays the largest role in the diamond's beauty (taking the time to clean your diamond ring at least every six months or so plays a role in maintaining said beauty). And on 1stDibs, a range of buying guides can be found for those in the market for antique engagement rings, vintage engagement rings or Art Deco engagement rings.
Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.
- 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.












