Antique Square Cut Diamond
Early 20th Century Unknown Art Deco Antique Square Cut Diamond
Sapphire, Diamond, Gold, 14k Gold, White Gold
1920s Unknown Art Deco Antique Square Cut Diamond
Diamond, Sapphire, 18k Gold, Yellow Gold
15th Century and Earlier American Modern Antique Square Cut Diamond
Diamond, Opal, Fire Opal, Platinum
15th Century and Earlier American Modern Antique Square Cut Diamond
Diamond, Emerald, Green Sapphire, Sapphire, Platinum
Early 1900s Edwardian Antique Square Cut Diamond
Pearl, Ruby, Gold, 14k Gold, White Gold, Platinum
15th Century and Earlier American Modern Antique Square Cut Diamond
Diamond, Emerald, Green Sapphire, White Gold
Early 20th Century British Art Deco Antique Square Cut Diamond
Aquamarine, Diamond, Gold, 18k Gold, Platinum
Late 17th Century European Renaissance Antique Square Cut Diamond
Sapphire, 18k Gold
Early 1900s French Victorian Antique Square Cut Diamond
Diamond, Ruby, 18k Gold
1780s Unknown Georgian Antique Square Cut Diamond
Diamond, Ruby, 14k Gold
Early 19th Century English Antique Square Cut Diamond
Bronze, Ormolu
1920s Art Deco Antique Square Cut Diamond
Diamond, Platinum
Early 20th Century Edwardian Antique Square Cut Diamond
Diamond, Ruby, 14k Gold, Yellow Gold, Platinum
Early 20th Century Art Deco Antique Square Cut Diamond
Diamond, Sapphire, Platinum
1920s Art Deco Antique Square Cut Diamond
White Diamond, Emerald, Platinum
1920s Unknown Art Deco Antique Square Cut Diamond
Diamond, Natural Pearl, Blue Sapphire, 14k Gold, Platinum
Late 19th Century Victorian Antique Square Cut Diamond
Amethyst, Diamond, 18k Gold
1920s Unknown Antique Square Cut Diamond
Diamond, Emerald, White Gold, Platinum
Early 20th Century Edwardian Antique Square Cut Diamond
Diamond, Pearl, Peridot, Platinum, Brass
1910s English Edwardian Antique Square Cut Diamond
Diamond, Emerald, 18k Gold
Early 1900s Contemporary Antique Square Cut Diamond
Diamond, Pink Sapphire, 18k Gold, Yellow Gold
1920s Unknown Art Deco Antique Square Cut Diamond
Diamond, Sapphire, 18k Gold, Platinum
1920s Art Deco Antique Square Cut Diamond
Diamond, Platinum
Early 20th Century Italian Classical Roman Antique Square Cut Diamond
Brown Diamond, Pearl, White Diamond, 18k Gold
1920s Art Deco Antique Square Cut Diamond
Diamond, Blue Sapphire, White Gold
15th Century and Earlier American Modern Antique Square Cut Diamond
Diamond, Tanzanite, Yellow Gold
1880s English Victorian Antique Square Cut Diamond
Glass
1920s European Art Deco Antique Square Cut Diamond
Diamond, Sapphire
15th Century and Earlier American Modern Antique Square Cut Diamond
Diamond, Emerald, White Gold
1870s English Victorian Antique Square Cut Diamond
Walnut
1920s Art Deco Antique Square Cut Diamond
Diamond, Sapphire, Platinum
1910s Art Nouveau Antique Square Cut Diamond
Diamond, Pearl, Ruby, Gold, 18k Gold, Yellow Gold
1920s American Art Deco Antique Square Cut Diamond
Diamond, Platinum
Early 20th Century Antique Square Cut Diamond
Diamond, White Diamond, Pearl, Natural Pearl, Platinum
Early 1900s French Belle Époque Antique Square Cut Diamond
Aquamarine, Diamond, White Diamond, Gold, Platinum, Enamel, 18k Gold, Ye...
1910s British Art Deco Antique Square Cut Diamond
Opal, Diamond, Gold
Early 18th Century Art Deco Antique Square Cut Diamond
White Diamond, Peridot, 18k Gold, Palladium
1860s Unknown Victorian Antique Square Cut Diamond
Diamond, 15k Gold, Silver
Early 20th Century Unknown Art Deco Antique Square Cut Diamond
Diamond, Ruby, Platinum
Early 19th Century North American Early Victorian Antique Square Cut Diamond
Citrine, Diamond, Yellow Gold, 14k Gold
Early 1900s Antique Square Cut Diamond
Diamond, Yellow Gold, Platinum
1870s English Victorian Antique Square Cut Diamond
Diamond, Ruby, White Diamond, Gold, Yellow Gold, Silver, 14k Gold
1920s British Art Deco Antique Square Cut Diamond
Diamond, Tourmaline, Platinum
1920s Swiss Art Deco Antique Square Cut Diamond
Diamond, Sapphire, Platinum
Early 20th Century Art Deco Antique Square Cut Diamond
Diamond, Ruby, 18k Gold, Yellow Gold, Platinum
Late 19th Century Unknown Renaissance Revival Antique Square Cut Diamond
Diamond, Pearl, Ruby, Gold, 18k Gold, Yellow Gold, Enamel
1920s Art Deco Antique Square Cut Diamond
Citrine, Diamond, Emerald, Ruby, Blue Sapphire, Platinum
16th Century Unknown Renaissance Antique Square Cut Diamond
Diamond, Yellow Gold
1920s Art Deco Antique Square Cut Diamond
Diamond, Emerald, Platinum
1910s French Art Deco Antique Square Cut Diamond
Diamond, Ruby, Platinum
1910s American Belle Époque Antique Square Cut Diamond
Diamond, Platinum
1920s Unknown Art Deco Antique Square Cut Diamond
Diamond, Sapphire, Platinum
1920s Art Deco Antique Square Cut Diamond
Diamond, Emerald, Onyx, Platinum
Early 1900s Edwardian Antique Square Cut Diamond
Diamond, Sapphire, 18k Gold, Yellow Gold
Early 20th Century Antique Square Cut Diamond
Diamond, Platinum
Early 20th Century Art Deco Antique Square Cut Diamond
Diamond, Sapphire, Platinum
1910s Unknown Edwardian Antique Square Cut Diamond
Diamond, Natural Pearl, Ruby, 18k Gold, Platinum, Mixed Metal
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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.