Beauty

Diamonds – How To Detect Color Alteration

Posted by admin
July 13, 2009
Diamonds are sometimes altered chemically to improve their value, and while some are only temporarily changed, many are altered permanently. This is one of the questions you should be asking your gemologist or jeweler, as well as the carat size and points ( out of 200 for a one carat flawless diamond).A new method of enhancing diamonds is known as high pressure high temperature (HPHT). Some of these techniques can lighten imperfections of dark color stains in a diamond. In fact, as A is considered the most perfect diamonds, this color enhancement can tint a Q to Z diamond to near colorless D,E, or F.

The alteration process can turn a white diamond in to a greenish yellow, yellow green, and even fancy colors such as pink. This can be detected, but only in labs which have the expensive testing equipment. Something fortunate for the buyer is that this coloring process cn only be found in rare diamonds, those in the A and B categories, and only sub groups in that. At this point your jeweler or gemologist should be able to tell if your diamond is of that category. It is estimated that less than two percent of all diamonds are of the type to allow color changes.

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