How Much Does a 15-Point Diamond Cost?

The price of a natural 15 ly diamond currently ranges from 18 billion VND to more than 60 billion VND per stone. A 15 ly diamond (15mm) is an ultra-large gemstone line, extremely rare, usually weighing from 12.5 to 14.5 Carats depending on the pavilion depth. With this enormous size, the stone is not only a high-class piece of jewelry but also a strategic accumulation asset reserved for the elite. Join Jemmia in exploring the detailed value and reference price list for this masterpiece right below.

What is the exact price of a 15 ly diamond?

The price of a natural 15 ly diamond currently ranges from 18 billion VND to more than 60 billion VND per stone, strictly depending on the 4C certification and the liquidity of the GIA certificate.

Based on the Rapaport Diamond Report 2026 price index (the international diamond price list for dealers), diamonds over 10 Carats belong to the "Special Stones" group.

The value of a 15 ly diamond does not increase arithmetically but grows geometrically. According to reports from major diamond exchanges in Belgium (Antwerp), the value of a 15 ly diamond (color D, clarity IF) can be 150 - 200 times higher than a 1 Carat diamond of the same quality due to its extremely high rarity in nature.

The price of a natural 15 ly diamond currently ranges from 18 billion VND to more than 60 billion VND per stone

Due to their extremely scarce nature, 15 ly diamonds with color D and clarity IF (Internal Flawless) can reach unbelievable prices at auctions. Below is a reference price list for the 15 ly diamond segment (Estimated weight ~14 Carats):

If you want to know the exact price, you can refer directly to the stores' websites. Or contact the store staff directly for a quick quotation.

Note: Diamond prices in the article were updated on 30/03/2026; in case of scarce supply, diamond prices may rise sharply in the future.

See now: Latest Jemmia diamond price list or Contact Jemmia now:0838 353 333

How many Carats is a 15 ly diamond?

According to the standard size conversion table of the Gemological Institute of America (GIA), an ideally cut diamond (Ideal Cut) with a diameter of 15.0mm will weigh from 12.5 to 14.5 Carats.

The exact Carat weight depends greatly on the pavilion depth and girdle thickness of the stone. A 15 ly diamond with an overly thick cut will weigh more but may reduce light performance, while a cut that is too thin may diminish its brilliant "fire." Therefore, when buying a large-size diamond, you need to carefully compare the Carat Weight parameters on the GIA certificate to ensure the perfect balance between face-up size and actual weight.

The special beauty of a 15 ly diamond

Whether large or small, diamonds always contain a magical beauty unmatched by any other gemstone. The “queen of gemstones” has always attracted people with its very unique traits. Especially with a size of up to 15 ly (15 millimeters), the product makes it even harder for people to look away.

A 15 ly diamond is enough to create prominence for any piece of jewelry, whether simple or elaborate in design. It is truly the perfect choice for luxurious parties, conferences, or meetings with partners.

In addition, during the formation process, the structure of diamonds is also mixed with natural impurities. They create many unique colors for diamonds, giving buyers more choices according to their preferences. However, with this size and weight, the price of the product is difficult for many people to access.

The beauty of a 15 ly diamond

See more: How much does a 50 carat diamond cost?

What type of jewelry is a 15 ly diamond suitable for?

A 15 ly diamond is the perfect choice for unique jewelry designs (Unique Piece) such as regal pendants or powerful men's/women's statement rings (Statement Rings).

With its enormous size equivalent to a large macadamia nut, this stone is not suitable for compact everyday jewelry styles. Instead, it shines best in designs such as:

• Diamond pendant: Creates a noble focal point for luxurious evening parties, helping the owner attract every gaze.
• Men's/Women's Statement Rings: Usually surrounded by bands of melee diamonds (Melée) or Baguette diamonds to maximize the honor of the main stone’s "huge" size.
• Diamond brooch: For heritage collections, carrying high historical and symbolic value.

Where is the best place to buy a 15 ly diamond?

JEMMIA DIAMOND is a leading reputable diamond expert, authorized by the Gemological Institute of America (GIA) to import and distribute genuine GIA-certified diamonds.

• 100% of the diamonds in the store are officially imported and have clear origins. Each diamond is quality certified by the GIA gemological institute.
• Diamonds at Jemmia Diamond are completely unused, carrying a sense of completeness for the owner.
• With a team of experienced artisans, the store continuously creates jewelry setting designs suitable for the beauty of each diamond. Each style carries its own beauty, meeting each person's needs.