3 Carat Antique Cushion Cut Diamond
1890s Unknown Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, Emerald, 14k Gold, Yellow Gold
1880s English Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, White Diamond, Ruby, Gold, 15k Gold, Yellow Gold
1920s American Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, White Diamond, Emerald, Platinum
1850s French Napoleon III 3 Carat Antique Cushion Cut Diamond
Diamond, White Diamond, Sapphire, Blue Sapphire, Gold, 18k Gold, Rose Go...
Early 20th Century Unknown Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, Emerald, Platinum
1830s Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Ruby, Gold, 14k Gold, Yellow Gold
1870s Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Tourmaline, Gold, 14k Gold, Yellow Gold
1910s Edwardian 3 Carat Antique Cushion Cut Diamond
Diamond, White Diamond, Yellow Diamond, Pink Diamond, Brown Diamond, Pla...
Early 20th Century Unknown Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, Ruby, Platinum
1910s Edwardian 3 Carat Antique Cushion Cut Diamond
Amethyst, Diamond, White Diamond, Pearl, Gold, 18k Gold, Yellow Gold, Pl...
1890s Early Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Emerald, 18k Gold, Platinum
1920s Unknown 3 Carat Antique Cushion Cut Diamond
Diamond, Sapphire, Gold, 18k Gold, Yellow Gold
Early 1900s Unknown Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Emerald, 14k Gold, Yellow Gold
18th Century 3 Carat Antique Cushion Cut Diamond
Diamond, Blue Sapphire, Gold, 18k Gold
Early 1800s Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Sapphire, Gold, 18k Gold, Yellow Gold
Early 20th Century Unknown Art Deco 3 Carat Antique Cushion Cut Diamond
Aquamarine, Diamond, White Diamond, Platinum
Early 20th Century Unknown Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, Blue Sapphire, 18k Gold, White Gold
19th Century 3 Carat Antique Cushion Cut Diamond
Diamond, Emerald, Gold, 18k Gold, Rose Gold
Early 20th Century Unknown Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, White Diamond, Sapphire, Blue Sapphire, 18k Gold, White Gold
1910s Edwardian 3 Carat Antique Cushion Cut Diamond
Diamond, Emerald, Platinum
1870s British Victorian 3 Carat Antique Cushion Cut Diamond
Blue Sapphire, 18k Gold
Late 19th Century Unknown Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, 14k Gold, Sterling Silver
1850s 3 Carat Antique Cushion Cut Diamond
Diamond, Emerald, Gold, Yellow Gold
Late 19th Century Art Nouveau 3 Carat Antique Cushion Cut Diamond
Diamond
1870s Napoleon III 3 Carat Antique Cushion Cut Diamond
Diamond, White Diamond, Gold, 18k Gold, Yellow Gold
Early 20th Century French Belle Époque 3 Carat Antique Cushion Cut Diamond
Sapphire, Blue Sapphire, Diamond, Gold, 18k Gold, Yellow Gold, Platinum
1890s Unknown Late Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Blue Sapphire, 14k Gold, Yellow Gold
1920s Art Deco 3 Carat Antique Cushion Cut Diamond
Chrysoberyl, White Diamond, Garnet, Sapphire, Gold, 14k Gold, Silver
1870s Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Ruby, Gold, 18k Gold, Yellow Gold
1890s English Late Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Zircon, White Diamond, Gold, 18k Gold, Yellow Gold
1910s Edwardian 3 Carat Antique Cushion Cut Diamond
Diamond, Sapphire, Gold, 18k Gold, Yellow Gold, Platinum
Late 19th Century Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, 18k Gold, Yellow Gold, Silver
Late 19th Century Belle Époque 3 Carat Antique Cushion Cut Diamond
Diamond
Early 20th Century Russian Edwardian 3 Carat Antique Cushion Cut Diamond
Diamond
Early 20th Century Unknown Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, Natural Pearl, Platinum
Early 20th Century French 3 Carat Antique Cushion Cut Diamond
Diamond
Early 1900s 3 Carat Antique Cushion Cut Diamond
Diamond, Emerald, 14k Gold
Early 20th Century Edwardian 3 Carat Antique Cushion Cut Diamond
Diamond, Sapphire
Late 19th Century Russian Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Sapphire
19th Century Unknown Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Garnet, Natural Pearl, 14k Gold, Silver
1870s American Victorian 3 Carat Antique Cushion Cut Diamond
Onyx, White Diamond, 18k Gold
1910s Edwardian 3 Carat Antique Cushion Cut Diamond
Diamond, Spinel, Gold, Platinum
1910s Unknown Art Deco 3 Carat Antique Cushion Cut Diamond
Emerald, White Diamond, Platinum
Late 19th Century Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Ruby, Sapphire
1920s Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, Blue Sapphire, Platinum
1920s Unknown Art Deco 3 Carat Antique Cushion Cut Diamond
Diamond, Platinum
1920s French Art Deco 3 Carat Antique Cushion Cut Diamond
Blue Sapphire, Diamond, Sapphire, White Diamond, 18k Gold, Gold, White Gold
Early 20th Century French Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Sapphire, 18k Gold, Rose Gold, Silver
Early 1900s French Belle Époque 3 Carat Antique Cushion Cut Diamond
Diamond, White Diamond, Gold, 18k Gold, White Gold, Platinum
1880s Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Emerald, Gold, 18k Gold, Silver
Early 1900s French Belle Époque 3 Carat Antique Cushion Cut Diamond
Diamond, White Diamond, Sapphire, Blue Sapphire, Gold, 18k Gold, Yellow ...
Early 1900s Edwardian 3 Carat Antique Cushion Cut Diamond
Diamond, White Diamond, Emerald, Gold, 14k Gold, Yellow Gold, Platinum
1870s Unknown Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Turquoise, 18k Gold
1890s Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Sapphire, 18k Gold, Yellow Gold
19th Century British Victorian 3 Carat Antique Cushion Cut Diamond
Diamond, Ruby, 18k Gold
20th Century English Edwardian 3 Carat Antique Cushion Cut Diamond
Garnet, 18k Gold
1850s Neoclassical 3 Carat Antique Cushion Cut Diamond
Diamond, White Diamond, Gold, 18k Gold, Yellow Gold, Silver, Enamel
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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.