How Much Does a 3.9 mm Diamond Cost?

3.9 mm diamond (3.9 mm brilliant-cut diamond) currently ranges in price from 9,900,000 VND to 12,000,000 VND. This price range corresponds to a weight of about 0.23 - 0.25 carat, making it a perfect choice for elegant women's ring designs or simple gemstone-studded earrings. To help you understand market fluctuations and choose a stone with optimal clarity, let’s explore the details with Jemmia Diamond in the article below!

How much does a 3.9 mm diamond cost?

The price of a 3.9 mm diamond commonly ranges from 9,900,000 VND to 11,400,000 VND based on the combination of actual weight and color grade. Due to slight differences in thickness and cut, the same 3.9 mm size can have unit prices that vary as follows:

• 3.9 mm diamond, weighing 0.23 carat, D color, VVS2 clarity, has a market selling price of 11,000,000 VND.
• 3.9 mm diamond, weighing 0.24 carat, D color, VS1 clarity, has a market selling price of 9,900,000 VND.
• 3.9 mm diamond, weighing 0.25 carat, D color, VS1 clarity, has a market selling price of 11,400,000 VND.

At this price, you can already own an extremely high-quality and valuable gemstone option. When combined with styles of ring settings and pendants, it becomes a piece of jewelry full of aesthetic value, preciousness, and sought after everywhere.

Note: Diamond prices in this article were updated on 23/03/2026; in cases of scarce supply, diamond prices may increase sharply in the future.

3.9 mm diamonds range in price from 9,900,000 VND – 11,400,000 VND.

Factors determining the quality and value of a 3.9 mm diamond

If you have looked into diamonds, you probably know that the price of a diamond depends on its quality. To evaluate diamond quality, people rely on 4 main factors including Color (Color), Cut (Cut), Clarity (Clarity), and Weight (Carat), collectively referred to as the 4Cs standard researched and evaluated by the Gemological Institute of America (GIA).

• Color: Prioritize D color to achieve absolute transparent whiteness.
• Clarity: Grades VVS1, VVS2, or VS1 help ensure the stone is clean and flawless under magnification.
• Cut: You should only choose Excellent so the diamond has the most brilliant fire and dispersion.
• Carat: With the same 3.9 mm size, the weight can vary slightly from 0.23 to 0.25 carat, directly affecting the price.

See more: The most beautiful pink diamonds in the world

To know what quality your 3.9 mm diamond has, the only way is to check the 4C information on the accompanying certificate. Once you have that information, merchants or gemstone jewelry stores will help you accurately appraise the diamond.

Factors determining the quality and value of a 3.9 mm diamond

Applications of 3.9 mm diamonds in high-end jewelry crafting

With a size of 3.9 mm (about 0.25 carat), 3.9 mm diamonds are favored by jewelers as the "golden ratio size." This is an ideal choice for creating a balance between sophistication and prominence in many jewelry lines such as diamond rings, earrings, and pendants:

• Solitaire engagement rings with a slender style: A 3.9 mm center stone set on a slim band enhances minimalist beauty. 
• Stud earrings (Diamond Studs): The 3.9 mm size is the standard for everyday earrings. It is large enough to create a sparkling highlight on the face while still ensuring lightness and comfort during movement.
• Halo pendants: When combined with a Halo ring (a border of small surrounding melee diamonds), a 3.9 mm diamond will look as large as a 5 mm stone, creating an extremely luxurious visual effect at an optimal cost.

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