12 Carat Ruby
21st Century and Contemporary Thai Belle Époque Cocktail Rings
Fire Opal, Ruby, Opal, Silver, Gold Plate, 22k Gold
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
Sapphire, Ruby, South Sea Pearl, 18k Gold, Silver, Gold Plate
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...
21st Century and Contemporary Thai Retro Link Bracelets
Amethyst, Ruby, Sapphire, Topaz, 18k Gold, Gold Plate, Silver
21st Century and Contemporary Greek Byzantine Bangles
Tanzanite, Green Sapphire, Yellow Sapphire, Pink Sapphire, Brown Diamond...
2010s Indian Art Deco Choker Necklaces
Diamond, Emerald, Blue Sapphire, Yellow Sapphire, Tanzanite, Tourmaline,...
2010s Indian Art Deco Choker Necklaces
Diamond, Emerald, Blue Sapphire, Yellow Sapphire, Tanzanite, Tourmaline,...
Late 20th Century Unknown Contemporary Clip-on Earrings
White Diamond, Ruby, Blue Sapphire, 18k Gold, White Gold, Yellow Gold
21st Century and Contemporary Unknown Modern More Bracelets
Vintage 1940s Unknown Retro Fashion Rings
Diamond, Ruby, 14k Gold, Rose Gold
20th Century Drop Necklaces
Diamond, Jade, Ruby, 14k Gold
2010s American Modern Bridal Rings
Diamond, Ruby, 18k Gold
Vintage 1940s American Retro Brooches
Ruby, 18k Gold
21st Century and Contemporary Fashion Rings
Diamond, Ruby, 18k Gold
Mid-20th Century More Necklaces
Diamond, Jade, Ruby, 18k Gold, White Gold
2010s Hong Kong Contemporary Clip-on Earrings
White Diamond, Yellow Diamond, Ruby, 18k Gold
20th Century Brooches
Cultured Pearl, Diamond, Ruby, 18k Gold
Antique 19th Century Link Bracelets
Diamond, 18k Gold
20th Century Art Deco Link Bracelets
Sterling Silver
Vintage 1970s Brooches
Diamond, Emerald, Multi-gemstone, Ruby, Sapphire, 18k Gold
2010s Italian Modern Fashion Rings
White Diamond, Ruby, 18k Gold, White Gold
Vintage 1960s Italian Modernist Brooches
Jade, Ruby, Gold, 14k Gold, Yellow Gold
21st Century and Contemporary Band Rings
Ruby, 18k Gold, White Gold
Early 2000s Dangle Earrings
Quartz, Ruby, Rose Gold
20th Century Unknown Cuff Bracelets
Ruby, 14k Gold, Yellow Gold
Vintage 1940s American Retro Stud Earrings
Aquamarine, Diamond, Ruby, 14k Gold
Vintage 1960s Modernist Brooches
Amethyst, Jade, Ruby, Gold, 14k Gold
21st Century and Contemporary American Contemporary Brooches
Diamond, Ruby, 18k Gold, Yellow Gold
20th Century English Modern Dining Room Tables
Gold
Early 2000s Choker Necklaces
Diamond, Ruby, 18k Gold, Yellow Gold
2010s Singaporean Pendant Necklaces
Diamond, Ruby, 18k Gold, White Gold
21st Century and Contemporary Fashion Rings
Ruby, Tourmaline, 18k Gold
21st Century and Contemporary American Artist Hoop Earrings
Diamond, White Diamond, Ruby, Gold, 18k Gold, White Gold
Mid-20th Century Unknown More Earrings
Diamond, Ruby, 18k Gold
21st Century and Contemporary Unknown Dome Rings
Diamond, Ruby, Blue Sapphire, 18k Gold
2010s Thai Art Deco Modern Bracelets
Ruby, Diamond, 18k Gold
21st Century and Contemporary American Brooches
Blue Sapphire, Diamond, Ruby, 18k Gold
Antique Early 1900s Cocktail Rings
Emerald, Ruby, Blue Sapphire, 18k Gold
Vintage 1950s American Retro Fashion Rings
Aquamarine, Ruby, 14k Gold, Yellow Gold
Vintage 1940s Retro Brooches
Diamond, Ruby, Yellow Gold
Vintage 1960s Italian Brooches
Amazonite, Blue Sapphire, Emerald, Ruby, White Diamond, 18k Gold
Late 20th Century Modern Bangles
Ruby, 18k Gold, Yellow Gold
2010s Thai Art Deco Modern Bracelets
Diamond, Ruby, 18k Gold
1990s Greek Contemporary Rope Necklaces
Diamond, Ruby, 18k Gold, Yellow Gold
Antique 1880s Unknown Brooches
Diamond, Ruby, Yellow Gold
2010s Israeli Lever-Back Earrings
Diamond, Ruby, Sapphire, 14k Gold, White Gold
21st Century and Contemporary British Modern Band Rings
Diamond, Ruby, 18k Gold, White Gold, Yellow Gold
Mid-20th Century Unknown Cocktail Rings
Opal, Ruby, 10k Gold, Yellow Gold
Vintage 1920s Art Deco More Necklaces
Diamond, Ruby, 14k Gold, White Gold, Platinum
Mid-20th Century Unknown Modern Cocktail Rings
Ruby, Turquoise, 14k Gold, Yellow Gold, Enamel
Vintage 1920s French Art Deco Bangles
Diamond, Ruby, Onyx, Platinum
Vintage 1940s Clip-on Earrings
Diamond, Ruby, 18k Gold
21st Century and Contemporary American Gothic Revival Pendant Necklaces
Diamond, Black Diamond, Ruby, Gold, 18k Gold, White Gold
2010s Israeli Chain Necklaces
Ruby, 18k Gold, Yellow Gold
2010s Tennis Bracelets
Diamond, Ruby, 14k Gold, Yellow Gold
Mid-20th Century Art Deco Retro Bracelets
Diamond, White Diamond, Ruby, Gold, 14k Gold, White Gold
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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.