70 Carat Diamond
2010s American Modern Stud Earrings
Diamond, Platinum
Vintage 1980s Contemporary Drop Necklaces
Diamond, 18k Gold
Antique Late 19th Century British Victorian Cluster Rings
Diamond, 18k Gold
Vintage 1920s Art Deco Three-Stone Rings
Diamond, Platinum
2010s Unknown Cocktail Rings
Diamond, Blue Sapphire, 18k Gold
21st Century and Contemporary Unknown Stud Earrings
Diamond, 18k Gold
21st Century and Contemporary American Contemporary Pendant Necklaces
Diamond, 18k Gold
2010s American Band Rings
Diamond, White Gold
2010s Art Deco Cocktail Rings
Diamond, Gold, Rose Gold, White Gold, Yellow Gold
Early 2000s American Modern Engagement Rings
Diamond, 14k Gold
21st Century and Contemporary American Contemporary Engagement Rings
White Diamond, Platinum
Early 2000s Italian Modern Chandelier Earrings
Diamond, Quartz, White Diamond, White Gold, 18k Gold
Vintage 1980s American Art Deco Cocktail Rings
Aquamarine, Diamond, Platinum
Early 2000s Spanish Contemporary Dangle Earrings
Diamond, Quartz, Tanzanite, White Gold
Mid-20th Century Art Deco Engagement Rings
Diamond, Platinum
21st Century and Contemporary Contemporary Stud Earrings
Diamond, 14k Gold, White Gold
Vintage 1950s Italian Contemporary Cocktail Rings
Aquamarine, Diamond, 18k Gold
2010s Israeli Art Deco Tennis Bracelets
Diamond, White Diamond, Gold, 14k Gold, White Gold
2010s Israeli Art Deco Engagement Rings
Diamond, White Diamond, White Gold, Gold, 18k Gold
21st Century and Contemporary Israeli Art Deco Engagement Rings
Diamond, White Diamond, Gold, 14k Gold, Rose Gold
2010s American Contemporary Engagement Rings
Pink Sapphire, Diamond, Platinum
Mid-20th Century American Art Deco Three-Stone Rings
Diamond, Platinum
Early 2000s American Modern Engagement Rings
Diamond, Black Diamond, 18k Gold, Yellow Gold
Early 2000s American Modern Cocktail Rings
Amethyst, Diamond, Opal, Fire Opal, 18k Gold, Yellow Gold, Platinum
21st Century and Contemporary Engagement Rings
Diamond, White Diamond, Yellow Diamond, 18k Gold, Yellow Gold, Platinum
Early 2000s American Art Deco Cocktail Rings
Diamond, Opal, Sapphire, 18k Gold, Rose Gold, White Gold, Silver
2010s American Art Nouveau Cocktail Rings
Diamond, Morganite, Pink Sapphire, 18k Gold
Vintage 1920s American Art Deco Retro Bracelets
Diamond, Ruby, White Diamond, Platinum
2010s Unknown Contemporary Solitaire Rings
Garnet, 14k Gold
2010s American Modern Cocktail Rings
Diamond, Sapphire, 18k Gold, White Gold
2010s More Necklaces
Diamond, White Gold
Vintage 1930s Art Deco Cocktail Rings
Diamond, White Diamond, Platinum
20th Century Unknown Art Deco Engagement Rings
Diamond, Sapphire, 18k Gold
Vintage 1960s French Retro Bracelets
Diamond, Gold
Vintage 1940s Retro Cocktail Rings
Diamond, Platinum
Vintage 1950s Wedding Rings
Diamond, Platinum
Vintage 1920s Art Deco Cocktail Rings
Diamond, Platinum
Early 2000s More Rings
Diamond, Turquoise, Platinum
Vintage 1960s Russian Contemporary Cluster Rings
Diamond, 18k Gold, Yellow Gold
1990s Swiss Wrist Watches
Diamond, 18k Gold
2010s American Modern Modern Bracelets
Diamond, 18k Gold
Early 2000s Contemporary Band Rings
White Diamond, Yellow Diamond, 18k Gold, Platinum
2010s Cocktail Rings
Diamond, White Diamond, Sapphire, Blue Sapphire, 18k Gold, White Gold
21st Century and Contemporary Fashion Rings
White Diamond, Yellow Diamond, Platinum
Mid-20th Century Art Deco Drop Earrings
Diamond, 18k Gold, Platinum, Yellow Gold
Early 2000s American Modern Pendant Necklaces
White Diamond, Yellow Diamond, Quartz, 18k Gold, White Gold, Yellow Gold
2010s Hong Kong Contemporary Stud Earrings
White Diamond, Yellow Diamond, 18k Gold
21st Century and Contemporary Fashion Rings
Diamond, Emerald, 14k Gold, Yellow Gold
21st Century and Contemporary Drop Earrings
Citrine, Diamond, 18k Gold, Yellow Gold
21st Century and Contemporary Necklace Enhancers
South Sea Pearl, White Diamond, 18k Gold
21st Century and Contemporary Swiss Art Deco Dangle Earrings
Diamond, Blue Sapphire, White Gold
Early 2000s Swiss Cocktail Rings
18k Gold, Yellow Gold
2010s American Contemporary Cocktail Rings
Diamond, White Diamond, Black Diamond, 18k Gold, White Gold
2010s Italian Contemporary Drop Earrings
Diamond, White Diamond, Silver, 9k Gold, Rose Gold
Antique 19th Century Unknown Victorian Engagement Rings
Diamond, 18k Gold, Rose Gold, Yellow Gold
21st Century and Contemporary Unknown Art Deco Dangle Earrings
Amethyst, 14k Gold
Early 2000s Swiss Wrist Watches
- 1
70 Carat Diamond For Sale on 1stDibs
How Much is a 70 Carat 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.
- Is there a three-carat diamond?1 Answer1stDibs ExpertApril 5, 2022Yes, there are three-carat diamonds, and you can find them from a number of different jewelers and other retailers. Find an assortment of diamond jewelry from the world’s top sellers on 1stDibs.
- What is a 24-carat diamond?1 Answer1stDibs ExpertMarch 22, 2022A 24-carat diamond is a precious diamond gemstone that weighs 24 carats. One carat weighs 200 milligrams, meaning a 24-carat diamond weighs roughly 4.8 grams. That equates to roughly 0.17 ounces. On 1stDibs, shop a variety of diamond jewelry.
- What is a 7 carat diamond worth?1 Answer1stDibs ExpertAugust 17, 2021A 7-carat diamond can cost anywhere between $12,000 and $185,000 depending on the quality of the stone. The fewer imperfections, the more expensive the diamond. Some 7-carat diamonds can cost more than $400,000.
- What is a 9 carat diamond worth?1 Answer1stDibs ExpertSeptember 28, 2021A 9-carat diamond’s worth varies depending on the 4Cs of diamond quality — color, cut, clarity and carat. On average, a 9-carat diamond could cost you between $19,000 to $1,000,000. It is also likely that the price range per carat will be even broader. On 1stDibs, you can find a variety of 9-carat diamond jewelry from different periods and styles to choose from.
- 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.
- What is 1 carat diamond worth?1 Answer1stDibs ExpertFebruary 22, 2021Depending on the quality, age, and designer, a 1-carat diamond can cost between $1,300 and $16,500.
- 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.
- 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.
- 1stDibs ExpertApril 5, 2022A nine-carat diamond is considered rare and holds a premium price. Because of their rarity and size, nine-carat diamonds are a coveted choice for engagement rings. One of the most famous nine-carat diamond rings belongs to actress Kate Hudson, who has a nine-carat emerald cut diamond complemented with tapered baguettes on a platinum band. Shop a selection of diamond jewelry on 1stDibs.
- Is a 1.5-carat diamond too big?1 Answer1stDibs ExpertFebruary 27, 2024Whether a 1.5-carat diamond is too big depends on the type of jewelry in question and your personal preferences. A single stud earring that is 1.5 carats is rather large and would cover the entire earlobe. In terms of rings, a 1.5-carat diamond is larger than average. Find a variety of diamond jewelry on 1stDibs.
- Is a two-carat diamond rare?1 Answer1stDibs ExpertFebruary 13, 2023Yes, a two-carat diamond is generally rarer than a smaller diamond, especially high-quality two-carat diamonds. When larger diamonds are found in nature, they usually have flaws. And prices per carat don’t increase as weight increases. A three-carat gem can be less valuable than a one-carat stone, for example, if all of the other attributes are of lesser quality in the larger diamond. Shop an assortment of diamond jewelry from some of the world’s top jewelers on 1stDibs.
- 1stDibs ExpertNovember 6, 2023There is no hard-and-fast rule for how many carats a diamond necklace should be. On average, solitaire diamond necklaces range from 0.5 to 1 carat, but you can find pieces with larger and smaller stones. Tennis chains that feature continuous diamonds set into links usually have much higher total carat weights. For example, one might feature 60 individual diamonds, each 0.20 carats in size, for a total carat weight of 12.0 carats. Shop a wide range of diamond necklaces on 1stDibs.
- 1stDibs ExpertSeptember 28, 2021The minimum value of a 25-carat diamond ranges from $300 to $1,400. The prices change subject to the fluctuation of market factors. The value is defined based on the 4Cs — color, clarity, cut and carat weight. Shop antique, vintage and new diamond jewelry on 1stDibs.
- 1stDibs ExpertSeptember 28, 2021An 8-carat diamond’s worth varies depending on the 4Cs of diamond quality – color, cut, clarity and carat. On an average an 8-carat diamond could cost you between $17,500 to $90,000. It is also likely that the price range per carat will be even broader. On 1stDibs, you can find a variety of 8-carat diamond jewelry from different periods and styles to choose from.
- What is a 4 carat diamond worth?1 Answer1stDibs ExpertSeptember 28, 2021A 4-carat diamond’s worth varies depending on the 4Cs of diamond quality – color, cut, clarity and carat. On average, a 4-carat diamond could cost you between $8,400 to $71,500. It is also likely that the price range per carat will be even broader. On 1stDibs, you can find a variety of 4-carat diamond jewelry.
- What is a 6 carat diamond worth?1 Answer1stDibs ExpertSeptember 28, 2021A 6-carat diamond’s worth varies depending on the 4Cs of diamond quality – color, cut, clarity and carat. On average, a 6-carat diamond could cost you between $15,000 to $80,000. It is also likely that the price range per carat will be even broader. On 1stDibs, you can find a variety of 6-carat diamond jewelry.
- What is a 5 carat diamond worth?1 Answer1stDibs ExpertSeptember 28, 2021A 5-carat diamond’s worth varies depending on the 4Cs of diamond quality – color, cut, clarity and carat. On average, a 5-carat diamond could cost you between $9,600 to $67,500. It is also likely that the price range per carat will be even broader. On 1stDibs, you can find a variety of 5-carat diamond jewelry.
- 1stDibs ExpertNovember 1, 2023Whether two-carat diamond studs are too big is a matter of personal preference. At this size, each earring will be one carat. If you opt for the classic round brilliant cut, the studs will typically measure around 6.5 millimeters in diameter, which is a little more than half the size of a dime. Find a wide range of diamond stud earrings on 1stDibs.
- 1stDibs ExpertNovember 8, 2023Whether 1.3-carat diamond earrings are too small is a matter of personal opinion. A pair of earrings with a total carat weight of 1.3 is considered to be medium-sized. The smallest diamond earrings are around 0.25 carats, while the largest are 1.5 carats or more. Explore a wide range of diamond earrings on 1stDibs.
- 1stDibs ExpertNovember 27, 2023Whether half-carat diamond studs are too small is a matter of personal opinion. A pair of diamond studs with a total carat weight of 0.5 usually consists of two 0.25-carat earrings. Many jewelry makers offer studs as small as 0.13 carats, so many people consider half-carat diamond studs to be medium-sized. On 1stDibs, shop a collection of antique and vintage diamond stud earrings.








