How much is a 3.9 carat diamond?

3.9mm diamonds (3.9mm brilliant diamonds) currently range in price from 9,900,000 VND to 12,000,000 VND. This price is equivalent to a weight of approximately 0.23 - 0.25 carats, making it a perfect choice for elegant women's ring designs or simple stone-set earrings. To help you grasp market fluctuations and select a stone with optimal clarity, let's explore the details with Jemmia Diamond through the article below!

How much does a 3.9mm diamond cost?

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

• 3.9mm diamond, weighing 0.23 carats, D color, VVS2 clarity is priced on the market at 11,000,000 VND.
• 3.9mm diamond, weighing 0.24 carats, D color, VS1 clarity is priced on the market at 9,900,000 VND.
• 3.9mm diamond, weighing 0.25 carats, D color, VS1 clarity is priced on the market at 11,400,000 VND.

With this price range, you can own a gemstone of extremely high quality and value. When combined with various ring settings, pendant settings, it will become an aesthetically pleasing, precious, and highly sought-after piece of jewelry everywhere.

Note: Diamond prices in this article are updated on March 23, 2026. In case of scarce supply, diamond prices may increase sharply in the future.

3.9mm diamonds have prices ranging from 9,900,000 VND to 11,400,000 VND.

Factors Determining the Quality and Value of a 3.9mm Diamond

If you have researched diamonds, you probably know that the price of a diamond depends on its quality. To assess diamond quality, people rely on four main factors: Color, Cut, Clarity, and Carat weight, collectively known as the 4Cs standard, researched and evaluated by the Gemological Institute of America (GIA).

• Color: Prioritize D color for absolute transparency and whiteness.
• Clarity: VVS1, VVS2, or VS1 grades ensure the stone is clean and flawless under magnification.
• Cut: Choose the Excellent grade for the diamond to have the most brilliant fire and dispersion.
• Carat weight: For the same 3.9mm size, the weight can vary slightly from 0.23 to 0.25 carats, directly affecting the price.

See more: The world's most beautiful pink diamonds

To know the quality of your 3.9mm diamond, the only way is to check the 4C information on the grading report that comes with the diamond. Once you have this information, diamond merchants or jewelry stores will help you accurately appraise your diamond.

Factors determining the quality and value of a 3.9mm diamond

Applications of 3.9mm Diamonds in High-End Jewelry Manufacturing

With a size of 3.9mm (approximately 0.25 carats), 3.9mm diamonds are affectionately called the "golden ratio size" by jewelers. This is an ideal choice to create a balance between delicacy and prominence in various jewelry pieces such as diamond rings, earrings, and pendants:

• Delicate Solitaire Engagement Rings: A 3.9mm center stone on a slender band enhances minimalist beauty.
• Diamond Stud Earrings: The 3.9mm size is standard for everyday earrings. It's large enough to create a sparkling accent on the face while ensuring comfort and lightness during movement.
• Halo Pendants: When combined with a halo (a circle of smaller surrounding diamonds), a 3.9mm diamond will appear as large as a 0.5 carat diamond, creating a luxurious visual effect at an optimal cost.

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