What Is High Pressure High Temperature (HPHT) Color Treatment?
HPHT stands for high pressure and high temperature. It is a method
of applying HPHT to those diamonds that are not fully crystallized
("premature diamonds") when released from fiery, erupting volcanoes.
The HPHT process is a scientific procedure that is carefully controlled. The HPHT
process is used to finish what nature started by applying 70,000 atmospheres (the
same atmospheric pressure that a diamond gets in the ground) at temperatures up
The HPHT process is the only permanent color enhancement process, the only treatment that completely saturates the diamond with color. Unlike irradiated and coated diamonds (another commonly used process to improve the look of diamonds), HPHT diamonds are impervious to change and need no special care to maintain their resilient color. In contrast, irradiated diamonds are prone to color fading at high temperatures and both irradiated and coated diamonds cannot be polished or recut without affecting their color.
What Are The Advantages Of Buying An HPHT diamond?
In short HPHT diamonds are genuine, mined diamonds. They are suitable for diamond buyers who want top color and clarity, at a substantially lower price, with GIA or EGL certificates.
We at CaratsDirect2U, carry a large selection of ½ carat, ¾ carat, 1ct, 1.5ct, 2ct HPHT Diamonds In Round, Pear, Heart, Marquise, Triangle Shapes as well as in clarities ranging from I1 until VVS2. We also carry the very sought after Pink colored HPHT diamonds such as a 0.71 carat VVS2 clarity fancy pink round shaped diamond, which would look great mounted in a 14 karat white gold as a solitaire pendant.
Check out our collection of HPHT loose diamonds.
All of these diamonds are available as loose diamonds as well as mounted in any of our 14k or 18k White, Yellow, Rose, or Two-Tone Gold engagement rings, pendants, or stud earrings. Please call one of our expert jewelers toll free at: 1-800-557-7095 if you have any more questions about out HPHT diamonds.