3 Carat Blue Diamond
21st Century and Contemporary Thai Contemporary Dangle Earrings
Blue Sapphire, Blue Topaz, Topaz, White Diamond, Diamond, Rose Gold, Whi...
Early 2000s Engagement Rings
Diamond, Blue Sapphire, Platinum
21st Century and Contemporary Indian Modern Pendant Necklaces
Diamond, Blue Diamond, Rhodium, Sterling Silver
Early 2000s Engagement Rings
Diamond, Blue Sapphire, Platinum
21st Century and Contemporary Indian Modern Pendant Necklaces
Diamond, Blue Diamond, Rhodium, Sterling Silver
Vintage 1930s Unknown Cluster Rings
Diamond, Sapphire, Blue Sapphire, 18k Gold, White Gold
21st Century and Contemporary Indian Modern Pendant Necklaces
Diamond, White Diamond, Blue Diamond, Rhodium, Sterling Silver
2010s American Modern Three-Stone Rings
Diamond, Blue Sapphire, Sapphire, Platinum
Vintage 1960s Unknown Contemporary Cocktail Rings
Diamond, Blue Sapphire, Sapphire, 18k Gold, Gold
21st Century and Contemporary Three-Stone Rings
Diamond, Blue Sapphire, 18k Gold, White Gold
21st Century and Contemporary Thai Contemporary Stud Earrings
Diamond, White Diamond, Aquamarine, 18k Gold, White Gold
21st Century and Contemporary Thai Contemporary Stud Earrings
Aquamarine, Diamond, White Diamond, 18k Gold, White Gold
21st Century and Contemporary American Contemporary Three-Stone Rings
Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum
21st Century and Contemporary American Contemporary Three-Stone Rings
Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum
20th Century Retro Engagement Rings
Diamond, Sapphire, Gold, 10k Gold, Rose Gold, Yellow Gold
2010s British Modern Engagement Rings
Amethyst, Aquamarine, Citrine, Diamond, White Diamond, Pink Diamond, Eme...
21st Century and Contemporary Contemporary Solitaire Rings
Diamond, White Diamond, Sapphire, Blue Sapphire, Gold, 18k Gold, White Gold
Vintage 1970s Retro Cocktail Rings
Diamond, Sapphire, Blue Sapphire, Platinum
21st Century and Contemporary Unknown Art Deco Pendant Necklaces
Topaz, Blue Topaz, Diamond, 10k Gold, Yellow Gold
21st Century and Contemporary American Artisan Engagement Rings
Blue Sapphire, Diamond, White Diamond, 18k Gold, Gold, White Gold
21st Century and Contemporary Indian Contemporary Tennis Bracelets
Blue Diamond, White Gold
21st Century and Contemporary Unknown Art Deco Cocktail Rings
Blue Diamond, Diamond, Platinum, Sterling Silver
Antique Mid-19th Century Edwardian Brooches
Diamond, White Diamond, Sapphire, Blue Sapphire, Spinel, 18k Gold
Vintage 1970s Italian Cluster Rings
Diamond, Sapphire, Blue Sapphire, 18k Gold
Vintage 1970s Italian Cluster Rings
Diamond, Sapphire, Blue Sapphire, 18k Gold
21st Century and Contemporary Modern Stud Earrings
Diamond, Blue Sapphire, 14k Gold, White Gold
Early 20th Century Edwardian Cocktail Rings
Diamond, Sapphire, Blue Sapphire, Platinum
2010s Belgian Contemporary Cluster Rings
Diamond, Pink Diamond, Blue Diamond, Yellow Diamond, 18k Gold
20th Century Chinese Contemporary Fashion Rings
Diamond, Blue Sapphire, Aquamarine, Gold, 18k Gold, White Gold
Early 2000s Engagement Rings
Diamond, Blue Sapphire, Platinum
2010s Engagement Rings
Diamond, Blue Sapphire, Platinum
Antique Late 19th Century English High Victorian Bangles
Diamond, Ruby, 18k Gold, Enamel
2010s Unknown Art Deco Cocktail Rings
Sapphire, Blue Sapphire, Gold, Silver, Sterling Silver, Rose Gold
2010s Hong Kong Three-Stone Rings
Diamond, Zircon, Gold, 18k Gold, White Gold
21st Century and Contemporary Hong Kong Modern Three-Stone Rings
Diamond, White Diamond, Topaz, Blue Topaz, Sapphire, Pink Sapphire, Gold...
21st Century and Contemporary Unknown Revival Engagement Rings
Diamond, Blue Sapphire, 18k Gold, White Gold
Mid-20th Century Unknown Retro Solitaire Rings
Aquamarine, Diamond, Blue Sapphire, 14k Gold, White Gold
Vintage 1920s Art Deco Tennis Bracelets
Diamond, Sapphire, Blue Sapphire, Platinum
20th Century Modern Engagement Rings
Diamond, Sapphire, Blue Sapphire, Platinum
21st Century and Contemporary American Modern Band Rings
Diamond, Blue Sapphire, Sapphire, Platinum, 14k Gold, White Gold
20th Century Engagement Rings
White Diamond, Blue Sapphire, Gold, 14k Gold, White Gold
21st Century and Contemporary Contemporary Three-Stone Rings
Diamond, White Diamond, Sapphire, Blue Sapphire, Gold, 10k Gold, Yellow ...
21st Century and Contemporary Greek Byzantine Band Rings
Diamond, White Diamond, Blue Diamond, Yellow Diamond, Pink Diamond, Blac...
Vintage 1920s Unknown Art Deco Engagement Rings
Blue Sapphire, Diamond, Platinum
2010s Tanzanian Three-Stone Rings
Diamond, Sapphire, Blue Sapphire, Platinum
2010s American Three-Stone Rings
Diamond, Sapphire, Platinum
2010s Sri Lankan Engagement Rings
Diamond, Sapphire, Blue Sapphire, Platinum
Early 20th Century French Art Deco Cocktail Rings
White Diamond, Blue Sapphire, 18k Gold, Platinum
2010s Sri Lankan Engagement Rings
Diamond, Sapphire, Blue Sapphire, Platinum
2010s Asian Contemporary Cocktail Rings
Diamond, Topaz, Sterling Silver, Enamel
2010s Asian Contemporary Cocktail Rings
Diamond, Topaz, Sterling Silver, Enamel
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3 Carat Blue Diamond For Sale on 1stDibs
How Much is a 3 Carat Blue 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.
- What is a 3 carat diamond worth?1 Answer1stDibs ExpertSeptember 28, 2021A 3-carat diamond’s worth varies depending on the 4Cs of diamond quality – color, cut, clarity and carat. On average, a 3-carat diamond could cost you between $7,200 to $51,000. It is also likely that the price range per carat will be even broader. On 1stDibs, you can find a variety of 3-carat diamond jewelry today.
- How large is a 3-carat diamond?1 Answer1stDibs ExpertFebruary 27, 2024In terms of dimensions, how large a 3-carat diamond is varies. The shape of the diamond will determine its length and width. Weighing 600 milligrams, diamonds that are 3 carats are generally considered to be large stones. On 1stDibs, shop a large collection of diamond jewelry from some of the world's top dealers.
- 1stDibs ExpertFebruary 13, 2023Whether a 3-carat diamond is considered big is largely a matter of personal opinion. The average diamond is 1 to 2 carats in size. On 1stDibs, shop a selection of diamond jewelry.
- 1stDibs ExpertSeptember 16, 2024How much a 1-carat blue diamond is worth depends on its cut, clarity and color. Human-made synthetic blue diamonds of that size are often worth less than $10,000, while natural examples sourced through mining are generally valued at much higher prices. If a gemstone is set in a piece of jewelry, it may have additional value due to the precious metals, the maker of the piece, its age and other factors. Because so many variables can impact the potential value of a blue diamond, experts generally recommend having a certified appraiser or experienced jeweler assist with the valuation process. On 1stDibs, explore a diverse assortment of blue diamond jewelry.