How Much Is a 12-Carat Natural Diamond? Where Can You Buy One Reputably?
Key Takeaways
- A natural 12-carat diamond currently ranges in price from 6.5 billion to more than 40 billion VND (approximately 264,000 USD – 1.6 million USD). Stones with perfect D color or those belonging...
A natural 12-carat diamond currently ranges in price from 6.5 billion to more than 40 billion VND (approximately 264,000 USD – 1.6 million USD). Stones with perfect D color or those belonging to the rare fancy color diamond group can reach hundreds of billions of VND.
As part of the ultra-rare gemstone group, the price of a 12-carat diamond increases progressively: the greater the weight, the higher the price per carat. To better understand the converted weight (2.4 grams), actual size in ly, and reputable places to buy, join Jemmia Diamond in exploring the details in the article below.
How Much Does a 12-Carat Diamond Cost?
A 12-carat diamond is one of the highest-value product lines in the jewelry market. With a size of over 15 ly and a weight of 2.4 grams, the value of a stone can reach hundreds of thousands to millions of US dollars.
According to data from the Diamond Price Index® (2025), the average price of natural diamonds from 5 carats and above is around 21,997 USD/carat.
12×21.997≈264.000 USD (6.547.200.000 VNĐ)
Thus, a natural 12-carat diamond has an estimated price of 6,547,200,000 VND
However, this is only a reference level. In reality, the price of a 12-carat diamond can vary more, depending on:
- Color
- Clarity
- Cut
- International certification
- Fluorescence and other affecting imperfections
For example, many diamonds sized 12 carats and above have been listed at prices of more than 1 million USD on the international market when they achieve perfect color (D color) and high clarity (VVS).
It can be seen that a natural 12-carat diamond not only possesses dazzling beauty but is also a prestigious piece of jewelry among the upper class, appearing in the world's most distinguished collections and auctions.
Estimated price of a 12-carat diamond: 6,547,200,000 VND
How Much Does a 12-Carat Diamond Ring Cost?
If a 12-carat diamond already carries great value, then when crafted into a ring, the actual price is significantly higher due to many combined factors.
Factors affecting the price of a 12-carat diamond ring:
- Quality according to GIA's 4Cs standards.
- Design style
- Crafting material: 18K, 14K gold and the surrounding melee diamonds
- Crafting brand
On the international market, a ring set with a diamond of 12 carats or more usually costs from 400,000 USD to more than 1.2 million USD. For stones meeting high 4Cs standards, the price can far exceed the 1.5 million USD mark.
Reference: Women's diamond rings luxurious and sophisticated at Jemmia Diamond
Diamond rings set with stones of 12 carats or more usually cost from 400,000 USD to over 1.2 million USD
Where to Buy Diamonds Reputably and with Quality?
Given their great value, choosing a reputable place to buy diamonds is extremely important. Jemmia Diamond is one of the leading reputable diamond brands in Vietnam, trusted by a large number of customers thanks to its transparency and strict international standards.
Why choose Jemmia Diamond?
- 100% officially customs-imported: Every diamond comes with invoices and accompanying GIA documents, ensuring it is a legal asset.
- Only selecting the top 2% most beautiful diamonds in the world: Strictly selected, meeting GIA's high 4Cs standards, containing no imperfections that affect durability and structure.
- Pioneering the most modern GIA grading equipment: Equipped with GIA machinery imported from the United States such as GIA iD100, GIA Diamond Dock, GIA Match iD… allowing customers to directly verify quality.
- Diamonds with transparent origin: Imported only from countries that comply with the Kimberley Process, not mined from war zones, with transparent origin.
- Diamond prices public and transparent: Helping customers easily compare and choose according to their budget.
- Competitive buyback - trade-in policy on the market: Ensuring sustainable value and high liquidity for the diamond.
Jemmia Diamond diamonds ensure transparency and credibility in origin and pricing
A 12-carat diamond is the ultimate proof of luxury and power, while also being a rare long-term investment asset. With a weight of 2.4 grams, a diameter of over 15 ly, and a price ranging from hundreds of thousands to millions of USD, this is a segment reserved only for the elite and collectors.
To ensure ownership of a quality, transparent, and internationally certified 12-carat diamond, choose a reputable brand in the market.
Contact 0838 353 333 or Zalo Jemmia Diamond now for detailed expert consultation and receive a quote for a 12-carat diamond suitable for your needs.
How Many Ly Is a 12-Carat Diamond?
For the popular Round cut, a 12-carat diamond will have a diameter of about 14 - 15 ly.
For other cuts, a 12-carat diamond will have the following dimensions:
- Emerald cut: 14×12 – 16×12 ly
- Asscher cut: about 12 – 13 ly
- Oval cut: about 16×14 – 18×13 ly
- Radiant cut: about 15×11 – 14×12 ly
- Heart cut: about 15-16 ly
- Cushion cut: about 12-13 ly
See more: 6 hottest beautiful solitaire ring settings this year
How Many Grams Does a 12-Carat Diamond Weigh?
According to GIA's international standard (Gemological Institute of America):
With the standard round cut (Round Brilliant), a 12-carat diamond has a diameter of about 15.3 ly (~15.3 mm).
Note: The actual size may vary depending on cut proportions, depth, and cut shape (Oval, Emerald, Pear…).
Thanks to its large weight and diameter of over 15 ly, a 12-carat diamond is classified as an ultra-rare gemstone, usually appearing only in luxury jewelry collections or international auctions.
