3 Carat Blue Diamond
2010s Engagement Rings
Diamond, Platinum
2010s American Contemporary Dome Rings
Blue Diamond, 18k Gold, White Gold
2010s Tennis Bracelets
Diamond, 14k Gold, White Gold
1990s Art Deco Pendant Necklaces
Diamond, Blue Sapphire, 18k Gold
20th Century Modern Three-Stone Rings
Diamond, Blue Sapphire, 18k Gold, White Gold
Vintage 1960s American Modern Stud Earrings
Diamond, White Diamond, Topaz, 14k Gold, White Gold
2010s Modern Hoop Earrings
White Diamond, Blue Sapphire, White Gold
Vintage 1960s Italian Artisan Brooches
Blue Sapphire, 18k Gold
2010s Asian Contemporary Pendant Necklaces
Diamond, Blue Topaz, Sterling Silver, Gold Plate
20th Century Three-Stone Rings
Blue Sapphire, Diamond, White Diamond, Platinum
20th Century Three-Stone Rings
Blue Sapphire, Diamond, Sapphire, White Diamond, 18k Gold, White Gold
2010s Italian Clip-on Earrings
White Diamond, Blue Sapphire, 18k Gold, Yellow Gold
2010s Art Deco Engagement Rings
Aquamarine, Diamond, 18k Gold, White Gold
Antique 19th Century Three-Stone Rings
Blue Sapphire, Diamond, White Diamond, Platinum
Vintage 1980s Contemporary Stud Earrings
White Diamond, Blue Sapphire
Mid-20th Century Fashion Rings
Star Sapphire, Platinum
20th Century Hong Kong Modernist Three-Stone Rings
Blue Diamond, 18k Gold
21st Century and Contemporary Sri Lankan Contemporary Three-Stone Rings
Diamond, Blue Sapphire, Platinum
2010s Asian Contemporary Modern Bracelets
2010s Asian Retro Hoop Earrings
Diamond, Blue Sapphire, Sterling Silver
21st Century and Contemporary American Art Deco Engagement Rings
Diamond, Sapphire, Blue Sapphire, 18k Gold, Gold, Yellow Gold
Early 2000s American Modern Engagement Rings
Diamond, White Diamond, Sapphire, Blue Sapphire, 18k Gold, Rose Gold, Pl...
2010s Unknown Engagement Rings
Diamond, Sapphire, Blue Sapphire, Platinum
21st Century and Contemporary Indian Engagement Rings
Blue Diamond
Early 2000s American Modern Three-Stone Rings
Blue Sapphire, Platinum
21st Century and Contemporary American Art Deco Engagement Rings
Diamond, Sapphire, Blue Sapphire, 18k Gold, White Gold, Gold
2010s Art Deco Chain Necklaces
Gold
21st Century and Contemporary American More Earrings
Diamond, Blue Sapphire, White Gold
21st Century and Contemporary Contemporary Cocktail Rings
Diamond, White Diamond, Tanzanite, Gold, 18k Gold, White Gold
21st Century and Contemporary Contemporary Cocktail Rings
Diamond, White Diamond, Tanzanite, Gold, 18k Gold, White Gold
Late 20th Century Italian Retro Cluster Rings
Diamond, Blue Sapphire, 14k Gold, Rose Gold, Yellow Gold
2010s Three-Stone Rings
Diamond, Blue Sapphire, Platinum
21st Century and Contemporary Indian Contemporary Pendant Necklaces
Diamond, White Diamond, Blue Diamond, White Gold, 14k Gold
21st Century and Contemporary American More Earrings
Diamond, Blue Sapphire, White Gold
2010s Engagement Rings
Diamond, Blue Sapphire, Platinum
21st Century and Contemporary American Artisan Engagement Rings
Diamond, Blue Sapphire, Sapphire, Platinum
2010s Fashion Rings
Diamond, Blue Sapphire, Platinum
21st Century and Contemporary Indian Tennis Bracelets
Blue Diamond, Diamond, White Gold, 14k Gold
20th Century Three-Stone Rings
Diamond, Blue Sapphire, 18k Gold
21st Century and Contemporary Indian Contemporary Pendant Necklaces
White Diamond, Blue Diamond, White Gold, 14k Gold
21st Century and Contemporary American Modern Engagement Rings
Diamond, Blue Sapphire, Platinum
21st Century and Contemporary Indian Contemporary Drop Necklaces
Diamond, White Diamond, Blue Sapphire, 18k Gold, White Gold
21st Century and Contemporary Indian Contemporary Dangle Earrings
Diamond, White Diamond, Blue Sapphire, 18k Gold, White Gold
21st Century and Contemporary Modern Three-Stone Rings
Diamond, Blue Sapphire, Platinum
21st Century and Contemporary American Contemporary Fashion Rings
Blue Sapphire, White Diamond, Diamond, White Gold, 18k Gold
21st Century and Contemporary American Three-Stone Rings
Diamond, Blue Sapphire, Yellow Gold
21st Century and Contemporary Indian Contemporary Bangles
Diamond, White Diamond, Tanzanite, Gold, Yellow Gold, 14k Gold
21st Century and Contemporary Indian Contemporary Tennis Bracelets
Blue Diamond, White Gold
Early 20th Century Art Deco Cocktail Rings
Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum
21st Century and Contemporary Indian Contemporary Drop Earrings
Diamond, White Diamond, Tanzanite, 14k Gold, White Gold
21st Century and Contemporary Indian Contemporary Drop Earrings
Diamond, White Diamond, Tanzanite, 14k Gold, White Gold
21st Century and Contemporary Indian Contemporary Drop Earrings
Diamond, White Diamond, Tanzanite, 14k Gold, White Gold
Early 20th Century Revival Engagement Rings
Diamond, Blue Sapphire, 18k Gold, Yellow Gold
2010s American Contemporary Cocktail Rings
Diamond, White Diamond, Blue Diamond, 14k Gold, White Gold
2010s American Contemporary Cocktail Rings
Diamond, White Diamond, Blue Diamond, 14k Gold, White Gold
21st Century and Contemporary American More Rings
Diamond, Blue Sapphire, Platinum
21st Century and Contemporary Thai Contemporary Dangle Earrings
Blue Sapphire, Blue Topaz, Topaz, White Diamond, Diamond, Rose Gold, Whi...
- 1
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.