Treatments and Lab-Grown Diamonds

Don't assume that your diamond has not been treated. Diamonds have been treated for centuries. And every time someone thinks up a new way to color- or clarity-enhance a diamond, gem experts are put to the test to figure out the whys and hows to identify and classify these new gem treatments. The discovery of diamond treatments remains much the same as ever: Unusual appearing diamonds enter the market, and some observant jeweler asks a gem expert to examine it carefully. Then the discovery of a new treatment for diamond is announced. Diamonds have been painted, coated, heated, irradiated, and squeezed under high pressure with high temperatures (HPHT) in order to create, enhance, or even eliminate color. Cleavages have been filled with glass-like substances to mask their bright appearance. Lasers have been used to change dark obvious inclusions into white inconspicuous ones. Curiousl
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