Antique Square Cut Diamond
1920s Unknown Antique Square Cut Diamond
Diamond, Emerald, 18k Gold, Yellow Gold
Early 20th Century British Edwardian Antique Square Cut Diamond
Diamond, Sapphire, 18k Gold, Platinum
Early 20th Century Unknown Art Deco Antique Square Cut Diamond
Diamond, Sapphire, 14k Gold, White Gold
1910s Antique Square Cut Diamond
Diamond, Emerald, Natural Pearl, Peridot, White Gold
1920s Unknown Art Deco Antique Square Cut Diamond
Diamond, Sapphire, Platinum
1920s Antique Square Cut Diamond
Diamond, Emerald, Gold, 18k Gold, White Gold
1910s Unknown Edwardian Antique Square Cut Diamond
Diamond, Emerald, 18k Gold, Platinum
1920s British Art Deco Antique Square Cut Diamond
Diamond, Sapphire, Gold
1910s British Art Deco Antique Square Cut Diamond
Diamond, Sapphire, Platinum
19th Century Belle Époque Antique Square Cut Diamond
Aquamarine, Diamond, Pearl, Ruby, Gold, Platinum
Early 20th Century Unknown Art Deco Antique Square Cut Diamond
Diamond, Emerald, Platinum
1910s Unknown Antique Square Cut Diamond
Diamond, Sapphire, Pearl, 18k Gold, White Gold
Late 19th Century Unknown Antique Square Cut Diamond
Diamond, Sapphire, Yellow Gold
Early 20th Century Art Deco Antique Square Cut Diamond
Diamond, Blue Sapphire, Platinum
1920s Unknown Art Deco Antique Square Cut Diamond
White Diamond, Ruby, Platinum
1920s Art Deco Antique Square Cut Diamond
Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum
1920s Art Deco Antique Square Cut Diamond
Diamond, Emerald, Gold, 14k Gold, Yellow Gold
Early 1900s Unknown Victorian Antique Square Cut Diamond
Diamond, Emerald, 18k Gold, Yellow Gold
1920s Art Deco Antique Square Cut Diamond
Diamond, Emerald, Platinum
Early 20th Century Art Deco Antique Square Cut Diamond
Diamond, Sapphire, 18k Gold, Yellow Gold, Platinum
Early 19th Century Unknown Art Deco Antique Square Cut Diamond
Diamond, Emerald, White Gold
1910s Edwardian Antique Square Cut Diamond
Diamond, Emerald, Gold, 18k Gold, Yellow Gold, Platinum
Early 20th Century Art Deco Antique Square Cut Diamond
Diamond, Sapphire, Gold, 14k Gold, White Gold, Yellow Gold
1920s Art Deco Antique Square Cut Diamond
Diamond, Emerald, 14k Gold, White Gold, Platinum
1870s Victorian Antique Square Cut Diamond
Diamond, White Diamond, Emerald, Gold, 14k Gold, Yellow Gold
1910s British Edwardian Antique Square Cut Diamond
Diamond, Sapphire, 18k Gold, Yellow Gold, Platinum
1910s Unknown Edwardian Antique Square Cut Diamond
Diamond, Emerald, 18k Gold, White Gold
1910s British Edwardian Antique Square Cut Diamond
Diamond, Emerald, 18k Gold, Yellow Gold, Platinum
1920s Unknown Art Deco Antique Square Cut Diamond
Diamond, Sapphire, 14k Gold, Platinum
Early 1900s Arts and Crafts Antique Square Cut Diamond
Diamond, White Diamond, Emerald, Gold, Yellow Gold, 18k Gold
1920s Art Deco Antique Square Cut Diamond
Diamond, Sapphire, 14k Gold, White Gold
1920s British Art Deco Antique Square Cut Diamond
Diamond, Sapphire, White Gold
Early 20th Century Edwardian Antique Square Cut Diamond
Diamond, Ruby, Gold, 18k Gold, Yellow Gold, Platinum
Early 20th Century Unknown Art Deco Antique Square Cut Diamond
Diamond, Sapphire, Blue Sapphire, Platinum
1890s Victorian Antique Square Cut Diamond
Diamond, Sapphire, Gold, 14k Gold, Rose Gold, White Gold
Early 1900s Edwardian Antique Square Cut Diamond
Ruby, 18k Gold, Yellow Gold
Early 20th Century American Art Deco Antique Square Cut Diamond
Diamond, Sapphire, Gold, 14k Gold, Yellow Gold
Early 20th Century Unknown Art Deco Antique Square Cut Diamond
Diamond, Sapphire, 14k Gold, Gold, White Gold
1890s Late Victorian Antique Square Cut Diamond
Diamond, Emerald, Gold, 18k Gold, Yellow Gold
19th Century Antique Square Cut Diamond
Diamond, Ruby, Gold, 14k Gold, Rose Gold, White Gold
Early 20th Century French Belle Époque Antique Square Cut Diamond
Sapphire, Blue Sapphire, Diamond, White Diamond, Gold, 18k Gold, Yellow ...
1920s Art Deco Antique Square Cut Diamond
Diamond, Sapphire, Gold, 14k Gold, Yellow Gold, Platinum
1920s Art Deco Antique Square Cut Diamond
Diamond, Sapphire, Gold, 14k Gold, Yellow Gold, Platinum
1920s French Art Deco Antique Square Cut Diamond
Diamond, White Diamond, Ruby, Platinum, Gold, 18k Gold, Yellow Gold
1910s Belle Époque Antique Square Cut Diamond
Diamond, Pearl, Sapphire, Gold, 18k Gold, Yellow Gold, Platinum
1920s Art Deco Antique Square Cut Diamond
Diamond, White Diamond, Sapphire, Blue Sapphire, Gold, 14k Gold, White G...
1920s Art Deco Antique Square Cut Diamond
Diamond, Pearl, Ruby, Gold, 18k Gold, Yellow Gold, Platinum
Early 20th Century Unknown Art Deco Antique Square Cut Diamond
Aquamarine, Diamond, White Diamond, 18k Gold, White Gold
1920s French Art Deco Antique Square Cut Diamond
Diamond, White Diamond, Sapphire, Blue Sapphire, Gold, 18k Gold, Yellow ...
Early 20th Century Art Deco Antique Square Cut Diamond
Diamond, Platinum
19th Century British Victorian Antique Square Cut Diamond
Ormolu
1920s American Art Deco Antique Square Cut Diamond
Diamond, Emerald, Platinum
1920s French Art Deco Antique Square Cut Diamond
Diamond, Sapphire, Platinum, 18k Gold
1910s Edwardian Antique Square Cut Diamond
Diamond, Lapis Lazuli, 10k Gold
Early 20th Century French Belle Époque Antique Square Cut Diamond
Diamond, Gold, 18k Gold, Yellow Gold
Early 20th Century Unknown Art Deco Antique Square Cut Diamond
Diamond, Sapphire, Gold, Platinum, White Gold
1920s Antique Square Cut Diamond
Diamond, Platinum
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Antique Square Cut Diamond For Sale on 1stDibs
How Much is a Antique Square 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.
- 1stDibs ExpertNovember 13, 2024What a square-cut diamond is called depends on how the jeweler arranged its facets. A princess-cut diamond has a square shape and a brilliant cut that maximizes its sparkle. Another square-shaped cut is the Asscher, which is stepped to show off a diamond's color and clarity. Find a large selection of diamond jewelry on 1stDibs.