Laboratory-grown diamonds have a long, fascinating history—one which saw scientists pushed to their limit, helped determine the outcome of a world war, and truly highlighted the genius of human ingenuity and invention.
Most working in the industry are aware sapphires are routinely treated to increase their marketability. What many dealers, manufacturers, and retailers may not be aware of, however, is a relatively new treatment used to beautify unattractive sapphire: high pressure, high temperature (HPHT).
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