lab grown diamond

What are HPHT Diamonds

HPHT-Diamond-Everything-You-Need-To-Know

HPHT stands for high pressure, high temperature, and is one of the most used procedures for growing diamonds in a laboratory. This diamond generation procedure exposes carbon to tremendous temperatures and pressures in order to imitate the intense heat and pressure conditions found deep beneath the earth, where natural diamonds are formed.

History of HPHT Diamonds

The origins of HPHT diamond technology may be traced back to the mid-twentieth century, when scientists began investigating techniques to generate actual diamonds in laboratories by simulating the circumstances that natural diamonds originate deep below the Earth.
In 1955, Anders Kampe, a Swedish scientist, successfully created synthetic diamonds using HPHT technology, ushering in a new era of lab-made diamond fabrication.

How HPHT Diamonds are made?

HPHT Diamonds how they are made

HPHT, or high-pressure, high-temperature, is a process that recreates the intense heat and pressure found in the Earth’s mantle where diamonds naturally form.

Step 1: The process starts with heating a mixture of Gases (carbon, hydrogen, nitrogen, oxygen), and a carbon starting material Like graphite along with catalyst at a very high temperature.

Step 2: This mixture is exposed to extreme heat (1,300–1,600°C) and pressure (over 5 GPa) for several hours or days until it becomes a liquid substance.
Step 3: Under these conditions, the mixture melts and forms a distinctive raw shape and, creating a diamond crystal.
Step 4: The diamond is cooled, then cut, polished, and graded just like a natural diamond.

If talking in detail, HPHT diamond development occurs in a tiny capsule within an instrument capable of producing extremely high pressures. Within the capsule, a carbon starting material, such as graphite, dissolves in a molten flux of metals including iron (Fe), nickel (Ni), and cobalt (Co), lowering the temperature and pressure required for diamond development. The carbon material then migrates through the flux and crystallizes on the colder diamond seed, forming a diamond crystal. Crystallization takes from days to weeks to form one or more crystals.

This method generally takes more time than making CVD diamonds. HPHT Lab diamonds take approx. a month to grow whereas CVD diamonds take just a few weeks to create.

Characteristics of HPHT Diamonds

Let’s explore some of the characteristics of HPHT diamonds:

  1. Clarity and Color- HPHT diamonds possess a higher clarity than CVD diamonds and are graded as nearly colorless.
  2. Durability- These diamonds are appreciated for their durability ranked at 10 on the Mohs Scale of Hardness.
  3. Brilliance– They possess the same optical, physical, and chemical properties as natural diamonds that result in a beautiful brilliance to them.
  4. Chemical Composition- Pure Carbon is used to create a HPHT diamond which helps them to bring an ideal mimic of natural diamond.
  5. Color Enhancement- The HPHT method is perfect for making fancy colored diamonds.

Conclusion

HPHT lab-grown diamond technology has not only revolutionized the diamond business but also offered a number of advantages to consumers. HPHT diamonds are anticipated to become more and more important as technology develops, satisfying the needs of buyers who want to buy diamonds that are both high-quality and reasonably priced. Also, give the finest diamond in quality than CVD diamonds.