Gia Certified Opal
2010s Ethiopian Loose Gemstones
Opal
2010s Australian Loose Gemstones
Opal
2010s Australian Loose Gemstones
Opal
2010s Australian Loose Gemstones
Opal
2010s Australian Loose Gemstones
Opal, Black Opal
2010s Loose Gemstones
Opal, Black Opal
2010s American Solitaire Rings
Opal, 18k Gold, Yellow Gold
Late 20th Century Pendant Necklaces
Jade, Opal, Gold, 14k Gold, Yellow Gold
21st Century and Contemporary Pendant Necklaces
Diamond, Opal, Platinum
21st Century and Contemporary American Art Deco Engagement Rings
Black Opal, Opal, Diamond, Platinum
2010s American Solitaire Rings
Diamond, Opal, 14k Gold, Yellow Gold
21st Century and Contemporary Retro Cocktail Rings
Diamond, Opal, Platinum
21st Century and Contemporary American Art Deco Engagement Rings
Black Opal, Opal, Diamond, Platinum
2010s American Pendant Necklaces
Opal, Sapphire, Gold, 14k Gold, Rose Gold
Mid-20th Century Pendant Necklaces
Opal, Gold, 14k Gold, Rose Gold
2010s American Pendant Necklaces
Diamond, Opal, Gold, 14k Gold, White Gold
2010s American Engagement Rings
Diamond, Opal, 14k Gold, White Gold
1990s Art Deco Cocktail Rings
Diamond, Opal, Black Opal, Platinum
21st Century and Contemporary American Contemporary Fashion Rings
Black Opal, Opal, Yellow Diamond, Yellow Gold, Platinum, 18k Gold
21st Century and Contemporary Cocktail Rings
Diamond, Opal, Black Opal, Platinum
1990s American Drop Necklaces
Diamond, Opal, Black Opal, Gold
2010s American Pendant Necklaces
Opal, Yellow Sapphire, 18k Gold, Yellow Gold
20th Century North American Cocktail Rings
Diamond, Opal, White Gold
21st Century and Contemporary American Art Deco Engagement Rings
Diamond, Black Opal, Platinum
1990s Contemporary Cocktail Rings
Diamond, Black Opal, Gold, 14k Gold, White Gold
21st Century and Contemporary American Contemporary Fashion Rings
Opal, Black Opal, 18k Gold, Yellow Gold
Vintage 1950s Retro Pendant Necklaces
Black Opal, Gold, 18k Gold, Yellow Gold
21st Century and Contemporary Pendant Necklaces
Diamond, Opal, Ruby, Gold, 18k Gold, Yellow Gold
21st Century and Contemporary North American Art Deco Cocktail Rings
Opal, Garnet, Aquamarine, Yellow Gold, 18k Gold, Gold
2010s Modern Pendant Necklaces
Diamond, Black Opal, Gold, 18k Gold, White Gold
21st Century and Contemporary American Modern Cocktail Rings
Fire Opal, Opal, Diamond, White Gold, Rose Gold, 18k Gold
Mid-20th Century Pendant Necklaces
Diamond, Opal, Ruby, Gold, 14k Gold, White Gold, Yellow Gold
2010s Art Deco Cocktail Rings
Diamond, Opal, Gold, Platinum
2010s Art Deco Cocktail Rings
Diamond, Opal, Gold, Platinum
21st Century and Contemporary North American Cocktail Rings
Aquamarine, Opal, Black Opal, Platinum
21st Century and Contemporary Contemporary Fashion Rings
Diamond, Opal, 14k Gold, Yellow Gold
21st Century and Contemporary North American Three-Stone Rings
Diamond, Opal, Black Opal, Platinum
21st Century and Contemporary North American Cocktail Rings
Diamond, Opal, Black Opal, Platinum
Antique 19th Century Pendant Necklaces
Opal, Gold, 14k Gold
20th Century Australian Cocktail Rings
Diamond, Opal, Black Opal, 18k Gold, White Gold
21st Century and Contemporary North American Pendant Necklaces
Diamond, Opal, Black Opal, 18k Gold, White Gold, Platinum
2010s American Solitaire Rings
Diamond, Opal, 14k Gold, White Gold
2010s American Pendant Necklaces
Emerald, Opal, 14k Gold, Yellow Gold
21st Century and Contemporary North American Pendant Necklaces
Diamond, Opal, 18k Gold, White Gold, Platinum
Late 20th Century Unknown Pendant Necklaces
Opal, Sapphire, Emerald, Diamond, Yellow Gold, White Gold, 18k Gold, 14k...
Vintage 1970s Art Deco Cocktail Rings
Diamond, Opal, Platinum
2010s Loose Gemstones
Opal
21st Century and Contemporary Loose Gemstones
Opal
2010s Loose Gemstones
Fire Opal
2010s Loose Gemstones
Opal
2010s Loose Gemstones
Fire Opal
2010s American Cocktail Rings
White Diamond, Black Opal, Fire Opal, Platinum
Vintage 1970s More Bracelets
Opal, Yellow Gold, 18k Gold
1990s Australian Bangles
Diamond, Opal, 18k Gold, Platinum
21st Century and Contemporary Cocktail Rings
Diamond, Opal, 14k Gold
21st Century and Contemporary Dome Rings
Diamond, White Diamond, Opal, 14k Gold, White Gold
2010s Loose Gemstones
Opal
1990s Retro Cocktail Rings
Diamond, Opal, Black Opal, Platinum
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Gia Certified Opal For Sale on 1stDibs
How Much is a Gia Certified Opal?
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 ExpertApril 5, 2022Yes, Cartier diamonds are indeed GIA certified. The Gemological Institute of America (GIA) works closely with Cartier and certifies everything from the cut and clarity to the color of the gem. Shop a collection of expertly vetted Cartier jewelry from some of the world’s top sellers on 1stDibs.
- 1stDibs ExpertAugust 17, 2021In the United States, diamond rings are certified by an official gemological laboratory known as the Gemological Institute of America. A certified diamond ring means that the diamond has undergone a quality analysis by experts at an institution such as the GIA and these experts have issued a lab report that is indicative of the grading process.
- 1stDibs ExpertFebruary 22, 2021When a diamond is GIA certified, it means that the stone has undergone the meticulous set of grading procedures that have been established by the Gemological Institute of America. The GIA is not a jeweler — it is an independent, nonprofit group that sets the standards for determining the quality of a diamond.
- 1stDibs ExpertFebruary 13, 2023While diamond studs don't need to be GIA-certified to be sold, experts typically recommend that you only purchase diamonds that carry certification from the Gemological Institute of America (GIA) or Authentic Gem Security Lab (AGSL). Certifications bring transparency to the buying process, allowing you to know the level of quality of a diamond before you purchase it. Shop a collection of vintage and modern diamond gemstone earrings from some of the world’s top jewelers on 1stDibs.
- 1stDibs ExpertMarch 22, 2022Whether Neil Lane diamonds are GIA-certified or not depends on the piece. All of the diamonds featured in rings and other jewelry designs from the Neil Lane Couture collection do carry GIA certification. Pieces made for third-party retailers may not. On 1stDibs, find a collection of Neil Lane jewelry.
- 1stDibs ExpertAugust 15, 2024Many experts believe that buying a GIA-certified diamond is worth it. The Gemological Institute of America (GIA) has a well-established reputation for providing accurate, trustworthy ratings and certifications. A diamond that carries a GIA certification has undergone rigorous examinations and tests to assess its quality, which can make it a good investment. Find a diverse assortment of diamond jewelry on 1stDibs.
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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.
Talking Diamonds with the Jeweler Behind J. Lo’s Engagement Ring
Alon Ruschin, of Vivid Diamonds & Jewelry, channels his passion for gems into helping clients find just the right ring.