7 Carat Old Mine Cut
Vintage 1910s Unknown Edwardian Cluster Rings
Diamond, 18k Gold, Platinum, Gold
Vintage 1920s Art Deco Cocktail Rings
Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum
Early 20th Century British Edwardian Band Rings
Diamond, 18k Gold, Yellow Gold
Vintage 1930s Art Deco Engagement Rings
Diamond, White Diamond, Platinum
Vintage 1930s Unknown Art Deco Engagement Rings
Diamond, Platinum
Antique Late 19th Century Victorian Drop Necklaces
Diamond, Ruby, 14k Gold, Silver
Vintage 1930s Art Deco Engagement Rings
Diamond, Gold, Platinum
Early 20th Century Unknown Art Deco Band Rings
Diamond, 14k Gold, Yellow Gold
Antique Late 19th Century French Victorian Cocktail Rings
Diamond, 18k Gold, Yellow Gold
Vintage 1920s Unknown Art Deco Engagement Rings
Diamond, Platinum
2010s American Contemporary Engagement Rings
Diamond, White Diamond, Gold, 18k Gold, White Gold
Mid-20th Century Edwardian Engagement Rings
Diamond, Ruby, 18k Gold, Yellow Gold, Platinum
Vintage 1910s American Edwardian Brooches
Diamond, 18k Gold, Yellow Gold, Platinum
Early 20th Century Unknown Art Deco Cocktail Rings
Diamond, Opal, Gold, Yellow Gold, 18k Gold
Early 20th Century American Art Deco Engagement Rings
Blue Sapphire, Diamond, Platinum
Antique Early 1900s Unknown Edwardian Pendant Necklaces
Diamond, 18k Gold, Yellow Gold, Platinum
Early 20th Century Unknown Art Deco Bridal Rings
Sapphire, 18k Gold
Vintage 1930s Unknown Art Deco Engagement Rings
Diamond, Gold, 14k Gold, White Gold
Vintage 1930s French Art Deco Engagement Rings
Diamond, 18k Gold, White Gold, Platinum
2010s Wedding Rings
Diamond, Platinum
2010s British Modern Engagement Rings
Diamond, Platinum
21st Century and Contemporary Victorian Link Necklaces
Diamond, Gold, 18k Gold, Silver
Antique Late 19th Century British Victorian Engagement Rings
Diamond, Yellow Gold, Gold, 18k Gold
Vintage 1920s French Art Deco Engagement Rings
Diamond, Brown Diamond, Platinum
Vintage 1920s Art Deco Engagement Rings
Diamond, Blue Sapphire, Platinum
Vintage 1940s French Retro Dome Rings
Diamond, Platinum
Vintage 1910s Unknown Edwardian Brooches
Diamond, 18k Gold, Yellow Gold, Platinum
Vintage 1920s Art Deco Engagement Rings
Diamond, Platinum
21st Century and Contemporary Art Deco Cocktail Rings
Diamond, Blue Sapphire, 18k Gold
20th Century Engagement Rings
Diamond, Platinum
Vintage 1920s Art Deco Engagement Rings
Diamond, 18k Gold
20th Century Engagement Rings
Diamond, Platinum
Antique Late 19th Century Russian Victorian Drop Necklaces
Diamond
Early 20th Century Unknown Art Deco Link Bracelets
Diamond, Platinum
Vintage 1920s Art Deco Link Bracelets
Diamond, Emerald, White Gold
Vintage 1920s Unknown Art Deco Link Bracelets
Diamond, Emerald, 14k Gold, White Gold
Antique 1890s Victorian Engagement Rings
Diamond, 18k Gold, Platinum
Antique Early 1900s Solitaire Rings
Diamond, 14k Gold, Yellow Gold
Antique 1880s Unknown Victorian Necklace Enhancers
Diamond, 18k Gold, Yellow Gold
2010s American Engagement Rings
Diamond, Gold, 18k Gold, Yellow Gold, Platinum
Vintage 1930s Unknown Edwardian Bridal Rings
Diamond, Blue Sapphire, Platinum
Vintage 1950s American Dome Rings
Diamond, 18k Gold, Yellow Gold, Platinum
Antique 1890s Victorian Cluster Rings
Diamond, 14k Gold
Vintage 1930s Art Deco Cocktail Rings
Diamond, Platinum
Late 20th Century Engagement Rings
Diamond, Pink Sapphire, Sapphire, Platinum
Early 20th Century Unknown Art Deco Engagement Rings
Diamond, White Diamond, Gold, 14k Gold, White Gold
Antique 1860s Unknown Victorian Chain Bracelets
Diamond, Turquoise, Gold, 18k Gold, Yellow Gold
Mid-20th Century Victorian Engagement Rings
Diamond, 18k Gold
Vintage 1920s Art Deco Tennis Bracelets
Diamond, Platinum
Mid-20th Century Retro Cluster Rings
Diamond, Gold, 18k Gold
21st Century and Contemporary Unknown Art Deco Engagement Rings
Diamond, 14k Gold
2010s Unknown Stud Earrings
Diamond, 14k Gold, Yellow Gold
Antique Early 1900s British Edwardian Band Rings
Diamond, Gold
Early 20th Century Cluster Rings
Diamond, Pearl, 18k Gold, Silver
Antique Early 1900s British Edwardian Band Rings
Diamond, Gold
Antique Early 1900s Unknown Edwardian Engagement Rings
White Diamond, Platinum
Vintage 1930s Art Deco Solitaire Rings
Diamond, 18k Gold, White Gold
- 1
- ...
7 Carat Old Mine Cut For Sale on 1stDibs
How Much is a 7 Carat Old Mine Cut?
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.
Read More
This Absinthe-Hued Peridot Cocktail Ring Is Positively Intoxicating
Ancient Egyptians referred to the vibrant stone as the “gem of the sun.”
Our Guide to Engagement Ring Settings – And How to Choose One
There are many ways to showcase a diamond, from traditional prongs to a smooth, streamlined bezel. Here’s everything you need to consider.
Nothing Says Summer Heat Like This Ruby-Red Cartier Stunner
The vintage bombé ring is bursting with color and timeless style.
Zircon Rings: Our Guide to a Uniquely Colorful Natural Gemstone
Zircon is a magnificent and underrated natural gemstone that has been worn and adored for centuries.
[Survey] Two-Thirds of Jewelry Gift Recipients Don’t Want to Be Surprised
Givers of fine gems enjoy surprise more than receivers, and women more than men. Find out what else our survey of 3,000 Americans revealed.
Colorful Gemstones Are a Brilliant Choice for Engagement Rings
If diamonds don’t seem right, what about a magnificent sapphire, ruby or emerald?
Our Guide to Fancy-Colored Diamond Engagement Rings
Accounting for just 1 percent of all diamonds, these marvels of nature are exceedingly rare and gorgeously complex.
Our Guide to Victorian, Edwardian and Art Deco Engagement Rings
Learn about these antique jewelry styles, then choose a design that speaks to you.