How Much Does a 20-Carat Diamond Cost?
Key Takeaways
- 20 Carat diamonds are gemstones in the extremely rare "Special Stones" segment, with prices ranging from 30 billion VND to more than 200 billion VND per stone depending on the 4C certification....
20 Carat diamonds are gemstones in the extremely rare "Special Stones" segment, with prices ranging from 30 billion VND to more than 200 billion VND per stone depending on the 4C certification. With a gigantic size (about 18mm in diameter), this diamond is not only a regal piece of jewelry but also a strategic asset for the super-rich and collectors worldwide. Join Jemmia Diamond to explore the premium value of this treasure below.
How much does a 20 carat diamond cost?
The price of a 20 Carat diamond currently has no fixed level, ranging from tens of billions to hundreds of billions of VND, strictly depending on color grade (Color), clarity (Clarity), and the liquidity of the GIA certificate.
According to reports from major diamond exchanges in Antwerp (Belgium), diamonds over 10 Carats increase in value geometrically. A 20 Carat diamond with D color and IF clarity (Internally Flawless) may be priced 400 - 500 times higher than a 1 Carat diamond of the same quality. Below is the reference price list for 2026:
| Color Grade | Clarity | Cut | Reference Price (VND) |
| D | IF | Excellent | > 180.000.000.000 |
| E | VVS1 | Excellent | ~ 120.000.000.000 |
| F | VS1 | Excellent | ~ 75.000.000.000 |
| H | VS2 | Excellent | ~ 35.000.000.000 |
Note: Diamond prices in this article were updated on 30/03/2026; in case of scarce supply, diamond prices may rise sharply in the future.
See now: Latest updated diamond price list or Contact Jemmia now: 0838 353 333
The beauty of a 20 carat diamond
The beauty of a 20 Carat diamond lies in its absolute grandeur and its ability to display the strongest brilliance and fire thanks to a surface area larger than 18mm.
At this size, every intricate line of the cut is magnified, creating a miniature "universe of light." 20 Carat diamonds are often favored in cuts such as Round Brilliant, Emerald, or Pear to honor their nobility. Owning this gemstone is a way to affirm unrivaled status, a symbol of complete success that anyone would admire.
A 20 carat diamond has the strongest ability to display brilliance and fire thanks to a surface area larger than 18mm.
Important notes when buying a 20 carat diamond
When investing in a 20 Carat diamond, verifying the international GIA certificate and choosing a 100% brand-new diamond are vital factors for preserving asset value.
To own a worthy diamond, you need to note:
- International certification: It is mandatory to have GIA papers (Gemological Institute of America) to ensure global liquidity.
- Usage condition: Choose a 100% new diamond to preserve its auspicious feng shui energy, bringing lasting wealth and good luck.
- Actual specifications: Carefully compare the girdle inscription code and technical specifications (depth, proportion) to ensure the stone achieves the most brilliant fire.
More importantly, only new diamonds contain the best feng shui energy. They will bring prosperity, luck in work, and happiness in love.
- Diamonds must have full quality certification documents from reputable organizations. Each diamond will have quality certification papers clearly showing all product specifications. Therefore, when buying a 20 carat natural diamond, pay special attention to this.
- Diamonds with high purity, good color, and beautiful cut have higher value. If your budget is limited, consider carefully to choose a suitable product.
Important notes when buying a 20 carat diamond
Jemmia Diamond – The ideal choice for diamond lovers
JEMMIA DIAMOND is a reputable diamond expert, authorized by the Gemological Institute of America (GIA) to import and officially distribute diamonds in Vietnam.
Coming to Jemmia, customers can be completely assured because:
- iD100 authentication: Advanced technology helps absolutely identify natural diamonds, eliminating risks from synthetic or treated diamonds.
- Transparent origin: 100% of products come with VAT invoices, full official import documents, and confidentiality for VIP transaction information.
- Exclusive design: A team of experienced artisans supports the creation of unique jewelry settings, worthy of the value of a 20 Carat center stone.
Jemmia - A trusted address to buy diamonds
20 Carat diamonds symbolize luxury and are heritage assets with enduring value over time. Although the ownership price may reach hundreds of billions of VND, its symbolic value and growth potential are proof of glorious success. Contact hotline 0838 353 333 now for Jemmia Diamond to help you hunt for the world's rarest "Special Stones" diamonds.
