2026 10-carat natural diamond price. Where to buy from a reputable source?
Key Takeaways
- The price of a 10-carat diamond ranges from 65,000 USD to more than 1.3 million USD (1.6 billion to over 30 billion VND). In this article, Jemmia will help you explore in...
The price of a 10-carat diamond ranges from 65,000 USD to more than 1.3 million USD (1.6 billion to over 30 billion VND). In this article, Jemmia will help you explore in detail everything from actual value, converted weight in grams, corresponding size in ly, to the price of a 10-carat diamond ring and the most reputable place to buy one.
How Much Does a 10-Carat Diamond Cost?
A natural 10-carat diamond ranges in price from 1.6 billion to over 30 billion VND (about 65,000 USD – 1.3 million USD). As for natural fancy-colored diamonds (pink, blue, red), their value can reach tens of millions of USD at auctions due to their extreme rarity.
The reason for this enormous price gap is the progressive pricing rule: the greater the weight, the higher the price per carat. With the wide surface size of a 10-carat stone, even small differences in color grade or clarity can change the value by billions of VND.
Meanwhile, a 10-carat lab-grown diamond is considerably more affordable, ranging from 100 - 500 million VND (4,000 - 20,000 USD). This segment is suitable for fashion jewelry needs but does not have the same store-of-value potential or liquidity as natural diamonds.
A natural 10-carat diamond ranges in price from 1.6 billion to over 30 billion VND
See more: How much is a 7-carat natural diamond worth? Where to buy reputable ones?
How Many Grams Is a 10-Carat Diamond?
In the international gemstone measurement system, a 10-carat diamond is equivalent to 2 grams and has a diameter of about 14 mm (14 ly) for a standard round cut (Round Brilliant). This is a "huge" size, with a diameter nearly twice that of a typical 1-carat stone (only about 6.5 mm).
Below is a detailed conversion table to help you visualize the size of a 10-carat diamond by cut shape:
| Cut | Weight (Grams) | Estimated Size (Ly/mm) |
| Round | 2g | ~14.0 mm |
| Marquise | 2g | ~21.0 x 10.5 mm |
| Pear | 2g | ~18.0 x 12.0 mm |
| Heart | 2g | ~14.5 x 14.5 mm |
| Princess | 2g | ~11.0 x 11.0 mm |
See more: How Much Is a 5.4 ly Diamond Worth Today?
A 10-carat natural diamond weighs 2 grams
How Many Ly Is a 10-Carat Diamond?
A 10-carat diamond has a standard diameter of about 14 mm (equivalent to 14 ly) for a round cut (Round Brilliant). However, this ly size is not fixed and varies greatly depending on the shape and the depth profile of the cut.
For example:
- Emerald Cut: about 13×11 – 14×12 ly
- Asscher Cut: about 12 – 13 ly
- Oval Cut: about 16×12 – 16×14 ly
- Radiant Cut: about 13×11 – 13.5×11.5 ly
- Pear Cut: about 18×12 – 18×13 ly
- Heart Cut: about 14 – 15 ly
- Cushion Cut: about 12 – 13 ly
Thus, even with the same 10-carat weight, the diameter (ly size) can differ significantly. Therefore, when choosing a diamond, it is necessary to clearly distinguish between carat - weight and ly - size, while also considering the cut style for an accurate evaluation.
A 10-carat diamond with a Round cut has a diameter of about 14mm (14ly)
How Much Does a 10-Carat Diamond Ring Cost?
A 10-carat diamond ring ranges in price from 40 billion to over 80 billion VND for stones that meet high-quality standards (D color, IF-VVS1 clarity). In the more common segment (lower color grade or more inclusions), the minimum price is still around 20 - 30 billion VND.
This is an ultra-luxury jewelry line, whose value lies not only in the weight but also in the combination of the center stone’s 4Cs and the unique ring setting design.
10-carat diamond prices on the international market
- For a D-color, I clarity, Excellent Cut stone (Triple X, no Fluorescence): the price can range from 2-3 million USD (equivalent to ~50- 70 billion VND).
- For stones with rare colors such as Fancy Vivid Yellow, Fancy Pink, Fancy Blue, the price can increase many times over, even reaching hundreds of billions of VND.
- Average-quality stones (lower color, included clarity, poor cut) may be more “affordable,” but still fall in the range of 20-30 billion VND and above.
10-carat diamond ring prices in Vietnam
In the Vietnamese market, a ring set with a 10-carat natural diamond:
- High-quality type, with international GIA certification, ranges from 40- 80 billion VND.
- If the design includes additional melee diamonds or 18K gold quality, the value may increase by 5-10%.
- Thus, to own a 10-carat diamond ring, customers need to prepare a minimum budget of 20 billion VND for the standard line, and from 50-100 billion VND for the premium line.
A natural 10-carat diamond ring has a minimum price of 20 billion
See more: What Is Officially Imported Diamond? Why Should You Buy It?
Where to Buy a 10-Carat Diamond?
With a value reaching tens of billions of VND, choosing a supplier for a 10-carat diamond requires absolute strictness in legal compliance. Jemmia Diamond is a leading trusted destination, fully meeting the most rigorous international standards.
- 100% officially imported: Complete invoices and GIA documentation, guaranteeing legal assets and sustainable investment value.
- Top 2% selection worldwide: Only providing diamonds of the most perfect quality, with no structural defects.
- U.S. GIA technology: A pioneer in using the GIA iD100 machine to verify origin, eliminating 100% of the risk of mixed-in lab-grown diamonds.
- Ethical sourcing: Complying with the "Kimberley Process," committed to not using diamonds from conflict zones.
- Premium service: Private, luxurious transaction space along with the best buyback and trade-in policy on the market.
Reference: Natural diamond prices with attractive offers at Jemmia Diamond
Jemmia Diamond is a reputable and quality place to buy diamonds
FAQ - Frequently asked questions about 10-carat diamonds
Does a 10-carat diamond lose value when resold?
A 10-carat diamond does not lose value when resold; it even tends to appreciate strongly over time. Due to its extremely high rarity, a 10-carat diamond is classified as a safe-haven asset. Stones with GIA certification and perfect parameters always have international liquidity and a much better value retention rate than smaller sizes.
Why is the price difference between color grades in 10-carat size so large?
The price difference between color grades in 10-carat diamonds comes from the surface size of a 10-carat stone, where even the slightest yellow tint becomes more visible compared to a 1-2 carat stone. A 10-carat D-color (colorless) diamond is extremely rare, so its value can be two or three times higher than a J-K color stone of the same weight.
Do you need a GIA certificate when buying a 10-carat diamond?
Any diamond needs a GIA certificate. For an asset worth tens of billions of VND, a GIA certificate is the only "birth certificate" that verifies natural origin, quality, and ethical sourcing. Absolutely do not trade large-size diamonds without international documentation to avoid the risk of counterfeit or treated goods.
In summary, the answer to the question of how much a 10-carat diamond costs depends on its quality and origin, and can range from several billion to tens, even hundreds of billions of VND. If you are looking for a reputable place to buy, Jemmia Diamond is a trustworthy choice, offering internationally certified products along with premium consultation and crafting services.
