12 Carat Ruby
21st Century and Contemporary Cufflinks
Ruby, Gold, 18k Gold, White Gold, Yellow Gold
2010s Malagasy Modern Cocktail Rings
Diamond, Ruby, White Gold
Late 20th Century Modernist Pendant Necklaces
Ruby, Gold, 14k Gold, Yellow Gold
Mid-20th Century Unknown Modern Cocktail Rings
Aquamarine, Ruby, Platinum
2010s Indian Modern Drop Earrings
Diamond, Ruby, Silver
Vintage 1940s Cocktail Rings
Diamond, Ruby, 18k Gold
2010s Solitaire Rings
Diamond, Ruby, 14k Gold, Yellow Gold
2010s Stud Earrings
Diamond, Ruby, 18k Gold, Yellow Gold
2010s Tennis Bracelets
Diamond, Ruby, 14k Gold, Yellow Gold
Late 20th Century Modern Modern Bracelets
Emerald, Blue Sapphire, Sapphire, Ruby, White Diamond, Diamond, White Go...
Mid-20th Century Retro Cocktail Rings
Citrine, Diamond, Ruby, Gold, Platinum
21st Century and Contemporary Mozambican Contemporary Loose Gemstones
Ruby
Vintage 1940s American Retro Stud Earrings
Aquamarine, Diamond, Ruby, 14k Gold
21st Century and Contemporary American Modern Cocktail Rings
Diamond, Ruby, Platinum
2010s Thai Contemporary Cocktail Rings
Diamond, Ruby, Gold, 14k Gold
21st Century and Contemporary Art Deco Link Bracelets
Diamond, Ruby, Gold, 18k Gold, White Gold
1990s Thai Contemporary Cocktail Rings
Diamond, Ruby, Gold, 14k Gold
Antique 1890s Brooches
Diamond, Ruby, Yellow Gold
2010s Solitaire Rings
Diamond, Ruby, Gold, 18k Gold, White Gold
Antique 19th Century Unknown Victorian Brooches
Diamond, Ruby, Yellow Gold
2010s American Chain Necklaces
Diamond, Ruby, 14k Gold, Yellow Gold
2010s American Pendant Necklaces
Diamond, Ruby, 14k Gold, Yellow Gold
2010s American Pendant Necklaces
Diamond, Ruby, 14k Gold, Yellow Gold
2010s American Pendant Necklaces
Diamond, Ruby, 14k Gold, Yellow Gold
Vintage 1970s Unknown Retro Retro Bracelets
Diamond, Ruby, Blue Sapphire, 14k Gold
2010s British Contemporary Solitaire Rings
Black Diamond, Ruby, 18k Gold, Yellow Gold
Mid-20th Century Brooches
Diamond, Ruby
2010s Fashion Rings
Diamond, Ruby, 14k Gold
21st Century and Contemporary American Contemporary Modern Bracelets
Diamond, Ruby, White Gold, 14k Gold
21st Century and Contemporary Drop Earrings
Diamond, Ruby, Gold, 18k Gold, White Gold
2010s Indian Cocktail Rings
Diamond, Ruby, 18k Gold
Vintage 1940s Retro Cocktail Rings
Diamond, Ruby, Gold, 14k Gold, Rose Gold, Palladium
Late 20th Century French Retro Brooches
Diamond, Emerald, Ruby, Sapphire, 18k Gold, Yellow Gold
21st Century and Contemporary Artist Cocktail Rings
Diamond, South Sea Pearl, Ruby, 18k Gold
Antique 1880s American Pendant Necklaces
Moonstone, Ruby, 14k Gold, Gold, Yellow Gold
2010s Singaporean Cluster Rings
Diamond, Ruby, 18k Gold, Yellow Gold
Vintage 1940s Unknown Art Deco Stud Earrings
Diamond, Ruby, 18k Gold, White Gold, Gold
21st Century and Contemporary Unknown Contemporary Cocktail Rings
Diamond, Ruby, Gold, 18k Gold, Yellow Gold
20th Century British Edwardian Pendant Necklaces
Diamond, Pearl, Ruby, Gold, 18k Gold, Yellow Gold
Vintage 1940s Unknown Retro Brooches
Diamond, Ruby, 18k Gold, Rose Gold
20th Century American Retro Brooches
Diamond, Emerald, Ruby, Sapphire, 18k Gold
Antique 1890s Unknown Brooches
Diamond, Pearl, Ruby, Yellow Gold
21st Century and Contemporary Unknown Modern Pendant Necklaces
Pearl, Ruby, 14k Gold, Yellow Gold
Early 20th Century American Art Deco Brooches
Ruby, 14k Gold, Yellow Gold
2010s Singaporean Cluster Rings
Diamond, Emerald, Ruby, 18k Gold, Yellow Gold
21st Century and Contemporary Thai Belle Époque Drop Necklaces
Quartz, Ruby, Topaz, 18k Gold, Gold Plate, Silver
20th Century Unknown Contemporary Band Rings
Ruby, Diamond, Gold, Yellow Gold, 14k Gold
21st Century and Contemporary Thai Baroque Drop Necklaces
Quartz, Ruby, Topaz, 18k Gold, Gold Plate, Silver
21st Century and Contemporary Thai Baroque Cocktail Rings
Topaz, Ruby, Amethyst, Silver, Gold Plate, 18k Gold
21st Century and Contemporary Thai Baroque Cocktail Rings
Ruby, Tanzanite, Topaz, 18k Gold, Gold Plate, Silver
21st Century and Contemporary Thai Belle Époque Cocktail Rings
Fire Opal, Ruby, Opal, Silver, Gold Plate, 22k Gold
21st Century and Contemporary Thai Baroque Cocktail Rings
Topaz, Ruby, Silver, Gold Plate, 18k Gold
21st Century and Contemporary Cluster Rings
Diamond, Ruby, 14k Gold, Yellow Gold
21st Century and Contemporary Thai Baroque Cuff Bracelets
Amethyst, Ruby, Topaz, 18k Gold, Gold Plate, Silver
21st Century and Contemporary Thai Art Nouveau Cocktail Rings
Emerald, Ruby, Pink Sapphire, 18k Gold, Gold Plate, Silver
21st Century and Contemporary Thai Baroque Drop Earrings
Yellow Sapphire, Green Sapphire, Blue Sapphire, Sapphire, Ruby, Opal, Si...
21st Century and Contemporary Thai Baroque Cocktail Rings
Sapphire, Ruby, South Sea Pearl, 18k Gold, Silver, Gold Plate
21st Century and Contemporary Thai Baroque Link Necklaces
Amethyst, South Sea Pearl, Ruby, Sapphire, Blue Sapphire, Pink Sapphire,...
21st Century and Contemporary Thai Baroque Cocktail Rings
Yellow Sapphire, Green Sapphire, Pink Sapphire, Sapphire, Ruby, Silver, ...
21st Century and Contemporary Modern Pendant Necklaces
Amethyst, Aquamarine, Ruby, Sapphire, Pink Sapphire, Yellow Sapphire, Ts...
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12 Carat Ruby For Sale on 1stDibs
How Much is a 12 Carat Ruby?
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.
- How big is a 12 carat diamond?1 Answer1stDibs ExpertFebruary 22, 2021The size of a 12 carat diamond is dependent on diamond cut. A 12 carat round diamond is roughly 15 mm in size.
- What is a 1 carat ruby worth?1 Answer1stDibs ExpertOctober 12, 2021What a 1-carat ruby is worth mostly depends on the color of the ruby. It is the most important factor in determining the ruby's value. The price of a pure brilliant red to slightly purple-red color is considerable. Depending on the color, purity, origin, and size, rubies can cost anywhere from $100 to $15,000 per carat. Shop a range of antique and vintage ruby jewelry on 1stDibs.
- 1stDibs ExpertOctober 12, 2021A Burmese ruby is around $1,400 - $1,600 per carat. It is believed to make its wearer more active, focused and aware of their surroundings. Shop for a variety of Burmese ruby jewelry on 1stDibs.