HPHT Diamond: Everything You Need To Know

Know About HPHT Diamonds Finegrown Diamonds

HPHT diamond (high pressure and high temperature) is made over in lab and the process was developed by the De Beers company to create diamonds that are more valuable than those created through traditional mining methods. The process involves heating a mixture of carbon, hydrogen, nitrogen, oxygen, and other elements at extremely high pressures for several hours or days until it becomes liquid metal. This causes the atoms within the material to rearrange themselves into new structures which can be used as gemstones. These gems have been known since ancient times but were not widely produced until recently due to their rarity and cost. Today they are commonly found in jewelry stores around the world.

Diamonds were originally formed deep underground where temperatures reached up to 2200 degrees Fahrenheit. As time went by, scientists began looking at ways to create synthetic diamonds using different methods. One method involved heating graphite ore until it turned into carbon and made from a carbon source. Another way was to heat silicon carbide which would then turn into quartz. Both of these materials could not produce diamonds though. 

HPHT diamonds are one type of lab-grown diamond, which means that they were grown in a laboratory instead of mined from the earth. These lab-grown HPHT diamonds have the same chemical optical, chemical, and physical properties as natural mined diamonds. They also have the same hardness, durability, and brilliance as naturally mined diamonds. The only difference between these two types of diamonds is their origin. HPHT diamonds can be made with any colour or clarity grade.

The HPHT treatment process does not change the appearance or quality of your diamond. It simply changes its original form into something more suitable for cutting. This new form makes it easier to cut and polish the stone. 

Future of HPHT Diamonds

The future of HPHT diamonds looks bright with many companies working on creating better technology to make them even stronger and cheaper. There are also plans to use this technique to create artificial diamonds from non-diamond starting materials such as coal tar and oil shale. It will take some time before we see any real results because there are still so many things to learn about how to control the reaction properly. However, if all goes well, we may soon find ourselves wearing our own custom designed engagement rings!

The HPHT process is the most common method of diamond production. It involves heating a mixture of carbon and metal to extremely high temperatures, which causes them to react with each other in various ways. The resulting product contains many different types of diamonds that are all formed at roughly the same time. This means they have similar characteristics such as color, clarity, hardness, etc., but can be differentiated by their size or shape.

Benefits Of Using HPHT Diamonds In Fine Jewelry

HPHT diamonds are preferred to use in fine jewelry along with various types of metals like gold, platinum, silver, etc. HPHT diamonds are available easily at a wholesale price and also got certified for diamonds clarity, and purity, for this reason, jewelry manufacturers rely on them and used them in jewelry to build ornaments. 

Reasonable Price:


HPHT diamonds come at an affordable price rather than a natural stone. Natural diamonds go expansive due to their long process of mining, supply chain, middle commissions, etc. And these HPHT diamonds comes to your direct from the lab, which is one of a reason you can go with HPHT diamonds.

Certified Diamonds:

These lab-grown diamonds (HPHT diamonds) come with certification from the genuine quality checking labs GIA, CGI, etc. when you purchased with that certification also comes. 



Natural diamonds damage the minerals, lands, and forests as well due to lots of cutting trees, and blast for mining there is earth damage that can directly affect climate change. This lab-grown HPHT diamond is completely environmentally friendly. 

A wide range of varieties are available

Diamonds grown in HPHT labs are available in many different types, which makes them perfect for any type of fine jewelry or engagement ring. You can choose from a wide range of shapes including; princess cut, round brilliant, pear-shaped, emerald cut, heart shape, oval, marquise, baguette, cushion, Asscher, radiant or any other type that we have available for sale. 

We are committed to providing our customers with the highest level of customer service and satisfaction while offering them an extensive selection of fine diamonds at competitive prices. Our goal is to provide you with the best value in all aspects of your purchase from start to finish!

Guide To Buying An HPHT Diamond

HPHT diamonds are now available online store website finegrowndiamonds and caratnation.com and the easiest way to choose required diamonds is based on size, carat, color, and type of it. HPHT diamonds are used in fine jewelry mostly current time and making engagement rings, bracelets, pendants, and other jewelry.  Buy loose diamonds requirement from a given website with fill its accurate details.

Buyers can choose and filter their requirements and make it easily their custom orders online and make payments with a secure payment option. 

HPHT Growth Process Vs. CVD process Vs. Natural Process

In the laboratory, the raw materials are heated up to a very high temperature under pressure to form new compounds called carbides. These carbide crystals grow into tiny grains of pure diamond. When these small grains become large enough, they’re separated out and polished until they shine bright white.

Growth process typical Typical growth morphology Photo example of rough
Natural diamonds
Shape: Octahedron
Growth: 8 Direction
HPHT Diamonds (High-pressure High temperature) 
Shape: Cuboctahedron
Growth: 14 Direction 
CVD Diamonds (Chemical vapour deposition)
Shape: Cube
Growth: 1 Direction
A table of the growth process of Natural diamonds, HPHT diamonds, and CVD diamonds.

HPHT Diamonds

How Does A HPHT Diamond Differ From Other Types?

A traditional “natural” diamond has been mined from its parent rock using explosives and heavy machinery. And HPHT and CVD diamonds are made in a Lab process under human observations. 

What Is High-Pressure High Temperature (HPHT) Color Treatment?

HPHT Diamonds | labgrown hpht color diamond | HPHT diamond process

Natural diamonds come in white colors but in lab-grown diamonds, there are possible ways to process color-based like a yellow diamond, blue diamond, pink diamond, and others, Diamonds colors ranging from D to H consider you can check our diamond color range page. 

HPHT process is all time fixed and you do not worried about maintaining lab-grown-based diamond color and shining.

What is the difference between HPHT diamonds and CVD diamonds?

There are major differences between HPT diamonds and CVD diamonds in just of growing processors for their morphologies techniques used. HPHT diamonds grow in cuboctahedron shape and have 14 growth directions, while CVD diamonds grow cubic and have 1 growth direction, while CVD diamonds grow cubic and have 1 growth direction.

HPHT Diamonds CVD Diamonds
Cuboctahedron shape cubic Cubic shape
14 Growth Direction 1 Growth Direction
Geometric color zoning even Even color distribution
Granning pattern No Granning pattern 
Metallic inclusion Graphite or other mineral inclusion
No strain pattern Banded strain pattern
Unusual fluorescence Unusual fluorescence 
Occasional phosphorescence Occasional phosphorescence
Difference between CVD diamonds and HPHT diamonds.

HPHT diamonds and CVD diamonds

If you are compare with these lab grown diamonds with natural one then you can see natural diamonds comes in octahedron shape and only have 8 growth directions. 

And in lab grown diamonds HPHT and CVD both have used different techniques to grow HPHT has comes with more yellowish and brownish types of diamonds developed and with CVD diamonds is developed colorless one. But current time both technologies implement to developed diamonds like colorless and flow less diamonds, and there minor difference happen rather this morphology technique. 

It’s worth noting that there’s a lot of conflicting information about which method of diamond growth is preferable. Behind the scenes, though, each corporation is attempting to push what benefits them the best. Customers will be advised to avoid HPHT diamonds by a CVD business, and vice versa.



Both methods produce high-quality stones at reasonable prices. Both methods use similar equipment and techniques. However, there are some differences between the two processes. For example, CVD diamonds are produced by heating the carbon source (graphite) under extreme pressure and temperature conditions. As a result, CVD diamonds tend to be more qualitative than HPHT diamonds.

In a CVD diamond production facility, graphite is heated in an enclosed chamber using a mixture of gases such as hydrogen and methane. The heat causes the graphite to decompose into carbon atoms, which then combine together to form diamond crystals. The resulting diamonds are very pure.

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