Bellataire® Diamonds
The HPHT Process

The HPHT Process - Default Image

Diamonds have been around for centuries, creating beautiful jewelry for people of all ages. Diamond trading has a profound history dating back to the 4th century BC*. While natural diamonds are formed by the extreme pressure and high temperatures beneath the earth’s surface, some inherit a brownish tint due to the stress from these conditions. At Malakan, we utilize a high-pressure, high-temperature process, also referred to as the HPHT process, for our Bellataire® diamonds that relieves these crystals of their stress, allowing them to return to their original colorless state. This results in a natural, beautiful, and permanent brilliance. 

The HPHT Process

What Are Bellataire® Diamonds?

The Bellataire® diamond brand was purchased by Malakan in 2019, allowing Malakan to offer its retailers round and fancy shapes in colorless and pink, blue, yellow, and green fancy colors. Bellataire® stones are natural diamonds that undergo a proprietary high-pressure, high-temperature (HPHT) process to improve their color. Every diamond larger than 3/4 carat is accompanied by a full GIA grading report and is laser-inscribed for authenticity and identification. These beautiful, HPHT-processed natural diamonds can save you 30-60% less than equivalent all-natural diamonds.

Bellataire® Diamonds Are:

  • Natural
  • Rare 
  • Ultra-pure
  • Collection Quality
  • Type IIa 
  • D through G in color
  • Rarely lower than VS1 in clarity  
  • Laser inscribed with Bellataire®
  • Sold only with GIA Diamond Grading Reports

The HPHT Process Gif 1


High Pressure High Temperature (HPHT) Process

High Pressure

 Mimicking the years of pressure applied by years of being under the earth’s surface, this process is recreated by us to bring Bellataire diamonds back to their original, colorless state.  Specialized equipment applies pressure ranging from 5 to 7 gigapascals, equivalent to 725,000 to 1,015,000 pounds per square inch. Under this amount of pressure, carbon atoms arrange themselves into distinct crystalline lattice structures, giving a diamond its brilliance.

High Temperature

High pressure alone cannot perfect diamond color; these gems must also undergo exposure to high temperatures. Diamonds found approximately 150-200 km below the surface, experience temperatures around 900-1,300 degrees Celsius. During the HPHT process, similar temperatures are applied to these diamonds.

For reference, lava from a volcano averages about 800 to 1200 degrees Celsius. This high temperature, combined with the intense pressure created during the HPHT process, will give the diamond a beautiful color with remarkable clarity.

The HPHT Process Gif 2

Is HPHT A Process Or Treatment?

The Gemological Institute of America (GIA) had to update the description of Bellataire® diamonds from “processed” to “treated” in order to categorize any diamonds that had undergone alterations or processes, placing Bellataire® diamonds in a broader category.


While many new technical processes alter the natural rough diamond, changing its weight, shape, color, size, and purity, the HPHT process restores the misaligned crystal to its original, intrinsic color. Unlike other non-permanent treatments, the HPHT process is permanent and cannot be reversed.

GIA allows Bellataire® to inscribe  “Bellataire®” & the GIA report number on the girdle, instead of “treated color”. Bellataire® is unique in that GIA allowed only Bellataire to have this exception.


Ensuring Quality and Authenticity

With the strict quality control of the diamond industry, it is essential to ensure each Bellataire HPHT diamond is up to quality standards and meets specific certifications. In the HPHT industry, certification and grading organizations help by reporting the quality of HPHT processed diamonds. To assess their attributes, one must meticulously evaluate HPHT diamonds, like most diamonds.

Industry certifications help consumers make informed decisions based on a diamond’s characteristics, such as carat weight, color, clarity, and cut.

Are Bellataire® Diamonds Natural Diamonds?

Some may inquire about whether Bellataire® diamonds are classified as natural diamonds or not. In fact, Bellataire® diamonds are 100% natural, with nothing added or taken away from the diamond. Bellataire® diamonds never undergo laser enhancement, fracture filling, or any other alterations that would compromise their natural characteristics. They simply restore colorless Bellataire® diamonds to their natural intrinsic color. Bellataire® Pinks are natural diamonds that undergo a proprietary four-step process that includes irradiation to give them their pink color. 

Three custom Bellataire diamond rings


How High Pressure High Temperature Natural Diamonds Can Help Your Jewelry Business

If your customers are looking for more affordable, high color, high clarity, natural diamonds in all shapes, Bellataire® diamonds distributed by Malakan are an excellent choice. Bellataire® diamonds are available through a select network of trusted jewelry retailers, and most jewelers will be the exclusive dealer in their city. 


Bellataire® diamonds offer customers a cost-effective alternative, being nearly half the price of comparable natural diamonds. Customers can fashion them into various types of jewelry, making them an ideal choice for virtually anyone. Ask about our Bellataire® diamonds today to learn how Malakan can help give your customers a more affordable diamond.




*GIA: Diamond History and Lore

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