HP HT process of Diamonds type 2A prices
Only very rare Diamonds type 2A containing nitrogen can be processed by High Temperature (HT) and High Pressure (HP) treatment to improve its appearance. It is a similar natural treatment as 3.3 billion years ago when nature create diamonds.
Only less than 1% of all diamonds, the very rare diamonds type 2a, are suitable for this improvement.
HPHT processed diamonds cost less. That gives you the possibility to buy a D color diamond for the price of an F color.
There is not one single difference between Diamonds from type 2 A, who were processed by nature 3.3 billion years ago, and diamonds who are processed artificial HP-HT now. These Diamonds are very rare especially in big sizes.
What happens by HPHT process?
By high temperature and high pressure nitrogen can be eliminated
An HPHT processed diamond can be recognized in gemological laboratory detecting that the diamond is nitrogen free
Detect HPHT treated and synthetic diamonds
HPHT process is created thanks to very expensive high tech processing machines who did not exist a few years ago. (2001)
The gemological laboratories which delivered diamond certificates before the year 1999 could not detect these characteristics.
It’s a DNA improvement of the diamond that gives the possibility to detect these characteristics.
But nobody can tell if it was natural or artificial. It is the same treatment.
Buying an HP-HT treated diamond has a genuine value.
Just pay the correct price for HPHT processed diamonds!
About 40 to 50% of the normal price! Consult diamond prices
Consult also cheapest cut
Diamond certificates will mention under “comments”:
HP/HT processed to improve its color.
In the girdle of the diamond you will find this engraved!
When not type A2 diamonds are HPHT processed the color will change in yellowish brown! View picture on this page.
HPHT treatment is only done for big stones at least from 3 carats and up.
HPHT stones are almost always loupe clean,
otherwise they explode at the treatment.
So you cannot find HPHT diamonds with inclusions like SI and Pique.