3 Carat Antique Cushion Cut Diamond
1880s British Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Other, Gold, 14k Gold, Yellow Gold
1910s Edwardian 3 Carat Antique Cushion Cut Diamond
Chalcedony, Diamond, Gold, 18k Gold, Yellow Gold
1920s British Art Deco 3 Carat Antique Cushion Cut Diamond
Aquamarine, Diamond, 18k Gold
20th Century European Edwardian 3 Carat Antique Cushion Cut Diamond
Early 20th Century Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, Gold, 18k Gold, Yellow Gold, Platinum
Early 1900s Art Nouveau 3 Carat Antique Cushion Cut Diamond
Diamond, Ruby, Tourmaline, Gold, 14k Gold, Yellow Gold
1920s Unknown Art Deco 3 Carat Antique Cushion Cut Diamond
Aquamarine, Diamond, 14k Gold, White Gold
1920s American Art Deco 3 Carat Antique Cushion Cut Diamond
Kunzite, Gold, 14k Gold, White Gold, Rose Gold, Yellow Gold
Late 19th Century Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, 14k Gold
1890s British Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Opal, 18k Gold
1920s English Art Deco 3 Carat Antique Cushion Cut Diamond
Onyx, Pearl, Blue Sapphire, Tourmaline, Fluorite, Gold, 18k Gold, Yellow...
1870s English 3 Carat Antique Cushion Cut Diamond
Agate, Ormolu
1920s French Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, Platinum
Early 1900s French Belle Époque 3 Carat Antique Cushion Cut Diamond
Diamond, White Diamond, Amethyst, Gold, 18k Gold, Yellow Gold
1860s Victorian 3 Carat Antique Cushion Cut Diamond
Sapphire, Diamond, White Diamond, Blue Sapphire, Gold, 14k Gold, Yellow ...
Late 19th Century Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Platinum
Early 20th Century Art Deco 3 Carat Antique Cushion Cut Diamond
Blue Sapphire, Diamond, Platinum
Early 1900s Unknown Edwardian 3 Carat Antique Cushion Cut Diamond
White Diamond
19th Century Victorian 3 Carat Antique Cushion Cut Diamond
Sapphire, Diamond, Yellow Gold, 14k Gold, Gold
Late 19th Century Unknown Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Turquoise, 18k Gold
1880s Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, 14k Gold
1890s British Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Ruby, 18k Gold
Early 20th Century Late Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, 14k Gold, Yellow Gold
19th Century Unknown Neoclassical 3 Carat Antique Cushion Cut Diamond
Yellow Sapphire, Gold, 14k Gold, Yellow Gold
1910s Edwardian 3 Carat Antique Cushion Cut Diamond
Diamond, Platinum
Early 1900s Unknown 3 Carat Antique Cushion Cut Diamond
Sapphire, Diamond, Platinum, Yellow Gold
1880s Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Sapphire, Gold, 18k Gold, Yellow Gold
Mid-19th Century French Napoleon III 3 Carat Antique Cushion Cut Diamond
Diamond, White Diamond, Emerald, Gold, 18k Gold, Yellow Gold
1760s English Georgian 3 Carat Antique Cushion Cut Diamond
Diamond, Yellow Gold, Silver, 14k Gold
Early 20th Century Unknown Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, Sapphire, Emerald, Platinum
Early 20th Century Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, Ruby, Yellow Gold, 14k Gold
Early 1900s Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, 18k Gold, White Gold
Early 20th Century Unknown Edwardian 3 Carat Antique Cushion Cut Diamond
Diamond, Peridot, Platinum
1920s French Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, White Diamond, Platinum
1920s French Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, Gold, 18k Gold, White Gold, Platinum
Late 18th Century European Romantic 3 Carat Antique Cushion Cut Diamond
Diamond, 18k Gold, Silver
1890s Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Ruby, 18k Gold, Yellow Gold
1920s Art Deco 3 Carat Antique Cushion Cut Diamond
Aquamarine, Diamond, Platinum
1890s European Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Blue Sapphire, Sapphire, 14k Gold
1910s Portuguese 3 Carat Antique Cushion Cut Diamond
Diamond, Sapphire, Gold, 18k Gold, Yellow Gold
1920s French Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, Sapphire, Platinum
1910s American Edwardian 3 Carat Antique Cushion Cut Diamond
Diamond, Garnet, Opal, 14k Gold
Early 20th Century British Retro 3 Carat Antique Cushion Cut Diamond
Diamond, Sapphire, Gold, 18k Gold, Yellow Gold
Early 20th Century French Edwardian 3 Carat Antique Cushion Cut Diamond
Emerald, Ruby, Sapphire, Gold, 18k Gold
Early 20th Century Russian Edwardian 3 Carat Antique Cushion Cut Diamond
Diamond
Early 1900s English Edwardian 3 Carat Antique Cushion Cut Diamond
Diamond, White Diamond, Ruby, Gold, 18k Gold, Yellow Gold, Platinum
1910s Unknown Edwardian 3 Carat Antique Cushion Cut Diamond
Diamond, Pearl, Topaz, 14k Gold
Late 19th Century English Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Ruby, 18k Gold
1920s Unknown Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, Sapphire, Yellow Gold
1920s European Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, Platinum
1880s English Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Peridot, 14k Gold, 15k Gold, Silver
1880s Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Sapphire, 18k Gold, Rose Gold
Early 1900s French Art Nouveau 3 Carat Antique Cushion Cut Diamond
Diamond, Natural Pearl, Blue Sapphire, Sapphire, 18k Gold, Platinum
Early 20th Century European Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, Rock Crystal, Sapphire, Blue Sapphire, Crystal, Gold, 14k Gold,...
1890s Russian Victorian 3 Carat Antique Cushion Cut Diamond
1870s Victorian 3 Carat Antique Cushion Cut Diamond
Amethyst, Diamond, Emerald, Ruby, 14k Gold, Yellow Gold
Early 20th Century American Art Nouveau 3 Carat Antique Cushion Cut Diamond
Agate, Gold, 18k Gold, Yellow Gold
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3 Carat Antique Cushion Cut Diamond For Sale on 1stDibs
How Much is a 3 Carat Antique Cushion Cut 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.