Treatment

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    The application of processes or agents to enhance the perceived color, clarity, phenomena, or durability of a diamond, colored gemstone, or pearl. Treatments are routinely applied to stones, with measurable results. Treatments are disclosed on EGL USA reports.

    For diamonds, see also Annealing, Feather Filling, High Pressure and High Temperature (HPHT), Irradiation, Internal Laser Drilling, Laser Drilling, and Surface Coating.

    For colored gemstones, see also Bleaching, Diffusion, Dyeing, Feather Filling, Heating, Impregnation, Irradiation, and Surface Coating.

    For pearls, see also Bleaching, Dyeing, Heating, Irradiation, and Surface Coating.

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