Octagonal Diamond
2010s Italian Contemporary Drop Earrings
Diamond, White Diamond, 18k Gold, White Gold
21st Century and Contemporary Brooches
White Diamond, Blue Sapphire, Gold, 18k Gold, White Gold
21st Century and Contemporary American Contemporary Engagement Rings
Diamond, Platinum
2010s American Engagement Rings
Diamond, Rose Gold
Vintage 1970s British More Rings
Diamond, White Gold, Yellow Gold
2010s Indian Wedding Rings
Diamond, Yellow Gold, 14k Gold, Gold
2010s Indian Wedding Rings
Diamond, Yellow Gold, 14k Gold, Gold
2010s Indian Fashion Rings
Diamond, Gold, 14k Gold, Yellow Gold
2010s Indian Fashion Rings
Diamond, Yellow Gold, 14k Gold, Gold
Vintage 1910s Belgian Hollywood Regency Dining Room Tables
Metal
Early 20th Century Belgian Art Deco Dining Room Tables
Metal
2010s Indian Fashion Rings
Diamond, Yellow Gold, 14k Gold, Gold
2010s Hong Kong Contemporary Engagement Rings
Diamond, Spinel, 18k Gold, White Gold
20th Century Moroccan Moorish Lanterns
Metal
2010s American Contemporary Stud Earrings
Diamond, White Diamond, 14k Gold, Yellow Gold, Mixed Metal
21st Century and Contemporary Asian Contemporary Fashion Rings
20th Century Moroccan Moorish Lanterns
Metal
2010s American Contemporary Hoop Earrings
Diamond, 14k Gold, Yellow Gold
Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants
Metal, Brass
20th Century American Modern Cocktail Rings
Diamond, Yellow Gold, Enamel
Vintage 1930s French Art Deco Cluster Rings
Diamond, Coral, Platinum
2010s American Modern Engagement Rings
Diamond, 18k Gold, Yellow Gold, Gold
2010s European Contemporary Hoop Earrings
Diamond, 18k Gold, White Gold
2010s Hong Kong Contemporary Link Bracelets
Aquamarine, Diamond, Gold, 18k Gold, White Gold
2010s Contemporary Stud Earrings
Diamond, Ruby, 14k Gold, White Gold
21st Century and Contemporary American Modern Engagement Rings
Emerald, Diamond, Gold, Yellow Gold, 18k Gold
21st Century and Contemporary American Art Deco Pendant Necklaces
Diamond, Emerald, Gold, 18k Gold, White Gold
Antique Early 1800s British George III Glass
Blown Glass
21st Century and Contemporary American Contemporary Stud Earrings
Diamond, Emerald, Gold, 14k Gold, Yellow Gold
21st Century and Contemporary American Art Nouveau Choker Necklaces
Diamond, Ruby, Gold, 18k Gold, White Gold
Vintage 1950s Austrian Art Nouveau Brooches
Diamond, 18k Gold, White Gold, Platinum
Mid-20th Century Austrian Mid-Century Modern Chandeliers and Pendants
Crystal, Brass
Vintage 1970s Unknown Modern Solitaire Rings
Diamond, Emerald, 18k Gold
Mid-20th Century Austrian Mid-Century Modern Chandeliers and Pendants
Crystal, Brass
Early 2000s Italian Modern Chain Necklaces
Diamond, Gold
2010s Contemporary Drop Earrings
Diamond, Ruby, 18k Gold, White Gold
21st Century and Contemporary Central American Art Deco Bridal Rings
Diamond, Morganite, 14k Gold, White Gold
Mid-20th Century Austrian Mid-Century Modern Chandeliers and Pendants
Crystal, Brass, Nickel
21st Century and Contemporary American Modern Pendant Necklaces
Diamond, Emerald, Yellow Gold, 18k Gold, Gold
21st Century and Contemporary American Modern Pendant Necklaces
Diamond, Blue Sapphire, Sapphire, White Gold, 18k Gold, Gold
2010s Engagement Rings
Diamond, Ruby, 18k Gold
21st Century and Contemporary Thai Modern Bridal Rings
Diamond, 18k Gold, White Gold
2010s Contemporary Fashion Rings
Diamond, Rhodolite, 14k Gold, Yellow Gold
2010s Contemporary Fashion Rings
Amethyst, Diamond, 14k Gold, Yellow Gold
Mid-20th Century Austrian Mid-Century Modern Chandeliers and Pendants
Crystal, Brass
21st Century and Contemporary American Modern Bridal Rings
Pink Sapphire, Sapphire, Diamond, Yellow Gold, 14k Gold, Gold
Vintage 1920s Persian Persian Rugs
Wool
21st Century and Contemporary American Art Deco Engagement Rings
Diamond, Platinum
21st Century and Contemporary American Art Deco Pendant Necklaces
Diamond, Emerald, Gold, 14k Gold, White Gold
21st Century and Contemporary American Art Deco Choker Necklaces
Diamond, Emerald, Gold, 18k Gold, White Gold
21st Century and Contemporary American Modern Pendant Necklaces
Diamond, Yellow Gold, Gold, 18k Gold
21st Century and Contemporary American Art Deco Pendant Necklaces
Diamond, Emerald, Gold, 18k Gold, White Gold
21st Century and Contemporary American Modern Pendant Necklaces
Diamond, Sapphire, Blue Sapphire, Gold, 18k Gold, Yellow Gold
21st Century and Contemporary American Art Deco Pendant Necklaces
Diamond, Emerald, Gold, 14k Gold, Yellow Gold
21st Century and Contemporary American Art Deco Pendant Necklaces
Diamond, Ruby, Gold, 18k Gold, Yellow Gold
21st Century and Contemporary American Modern Solitaire Rings
Citrine, Diamond, Gold, 18k Gold, Yellow Gold
21st Century and Contemporary American Modern Solitaire Rings
Diamond, Topaz, Blue Topaz, Gold, 18k Gold, Yellow Gold
21st Century and Contemporary American Art Deco Bridal Rings
Tanzanite, Diamond, Yellow Gold, 18k Gold, Gold
Vintage 1980s Drop Earrings
Diamond, Brown Diamond, Spinel, 18k Gold, Yellow Gold, Silver
2010s Asian Engagement Rings
Diamond, 18k Gold, White Gold
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Octagonal Diamond For Sale on 1stDibs
How Much is a Octagonal 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.