How much does an 11-carat diamond cost?

A 11-carat natural diamond currently ranges from VND 5.9 billion to over VND 35 billion (approximately USD 242,000 – USD 1.5 million). For stones with perfect color and clarity, or rare colored diamonds, the value can reach hundreds of billions of Vietnamese dong.

Due to being a super-rare gemstone, the price of an 11-carat diamond is calculated on a progressive scale: the larger the weight, the higher the price per carat. To understand the conversion weight, actual millimeter size, and reputable purchasing locations, please join Jemmia Diamond to learn more details below.

How much does an 11-carat diamond cost?

According to data from Diamond Price Index® (updated 2025), the average price of natural diamonds from 5 carats and above ranges around USD 21,997/carat. Thus, a natural 11-carat diamond is estimated to cost:

11×21,997≈242,000USD (approximately 5,929,000,000VNĐ)

However, this figure is for reference only. In reality, the price of an 11-carat diamond can range from USD 250,000 to over USD 550,000 depending on the following factors:

• Color
• Clarity
• Cut
• International Certification

For example, an 11.89ct Emerald Cut diamond, I/VS1, GIA certified, was once listed for over USD 551,000 on the international market.

It is evident that a natural 11-carat diamond is not only a luxurious piece of jewelry but also considered a rare investment asset, appearing only in high-end collections and major auctions.

How many millimeters and grams is an 11-carat diamond?

According to GIA (Gemological Institute of America) international standards, the weight and size of a diamond are converted as follows:

• 11 carats = 2.2 grams (1 carat = 0.2 grams).
• For a standard round cut (Round Brilliant), an 11-carat diamond has an approximate diameter of 14.9 millimeters (~14.9 mm).

Note: Actual size may vary depending on the cut proportion, depth, and shape (Oval, Emerald, Pear, etc.).

Thus, an 11-carat diamond is not only prominent for its large weight of 2.2 grams but also for its size of approximately 14.9 mm – it is classified as a rare gemstone, often appearing in high-end jewelry collections and international auctions.

An 11-carat diamond has a diameter of approximately 14.9 millimeters

How much does an 11-carat diamond ring cost?

With a price of around USD 242,000, when crafted into a ring, the actual price is usually significantly higher because the price of diamond jewelry depends on the following factors:

• The quality of the 4Cs
• Design style
• Ring material
• Crafting brand

On the international market, an 11.89ct Emerald Cut diamond ring, I/VS1, GIA certified, was once listed for over USD 551,000. For higher quality stones (D color, VVS clarity), the price can exceed USD 1 million.

Therefore, an 11-carat diamond ring is not only jewelry that signifies status but also a long-term investment asset, typically found in the collections of the super-rich or at international auctions.

See more: Elegant and sophisticated women's diamond rings with discounts up to 18% at Jemmia Diamond

An 11-carat diamond ring costs over USD 242,000

See more:  Distinguishing Moissanite and Diamonds: 8 Key Differences

FAQ - Frequently Asked Questions about 11-carat Diamonds

Is an 11-carat diamond the largest size?

An 11-carat diamond is not the largest size. However, in the jewelry industry, it is considered a super-rare and extremely large gemstone compared to ordinary commercial diamonds.

Why is there such a large price difference between colors for 11-carat diamonds?

The price difference between colors for 11-carat diamonds is significant because the wide surface area makes any yellowish tints (lower colors) very apparent. Therefore, perfectly colorless (D color) stones will be many times more valuable than those of other colors.

Is it mandatory to have a GIA certificate when buying an 11-carat diamond?

When buying an 11-carat diamond, an international GIA certificate is mandatory to ensure transparency regarding quality, natural origin, and to protect the investment value for the owner.

An 11-carat diamond is a symbol of luxury and status, and also a rare long-term investment asset. With its large weight, impressive size, and price in the hundreds of thousands of dollars, this segment is only for customers who truly understand and wish to affirm their position.

To ensure you purchase a quality diamond with transparency and an international GIA certificate, you should choose reputable and transparent brands that guarantee future asset security.

📞 Contact 0838 353 333 or Zalo Jemmia Diamond to get expert advice on 11-carat diamonds that suit your needs and budget.