Specific Forms of Gemstone Enhancement
Enhancement
Any treatment process other than cutting and polishing that improves the
appearance (color / clarity / phenomena), durability, or availability
of a gemstone.
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Bleaching
- The use of heat, light and / or other agents to lighten or remove a gemstone's
color.
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Coating
- The use of such surface enhancements as lacquering, enameling, inking,
foiling, or sputtering of films to improve color uniformity.
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Dyeing
- The introduction of coloring matter into a gemstone to give it new color,
intensify present color or improve color uniformity.
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Filling
- The filling of surface breaking cavities or fissures with colorless glass,
plastic, solidified borax or similar substances, which are visible under
properly illuminated10X magnification. This process willimprove durability,
appearance and / or add weight.
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Heating
- The use of heat to effect the desired alteration of color, clarity,
and / or phenomena. (Residue of foreign substances in open fractures is
not visible under properly illuminated 10X magnification.
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Heat
and Pressure
- The use of heat and pressure combined to effect desired
alterations of color and / or clarity.
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Impregnation
- The impregnation of a porous gemstone with a colorless agent (usually
plastic) to give it durability and improve appearance.
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Lasering
- The use of a laser and chemicals to reach and alter inclusions in diamonds.
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Oiling
/ Resin Infusion
- The filling of surface breaking fissures with
colorless oil, wax, resin or other colorless substances, except glass
or plastic to improve the gemstone's appearance.
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Irradiation
- The use of neutrons requiring and environmental safety release from the
Nuclear Regulatory Commission (NRC), Gamma and / or electron bombardment
to alter a gemstone's color. The irradiation may be followed by a heating
process.
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Diffusion
- The use of chemicals in conjunction with high temperatures to produce
color and / or asterism-producing inclusions.
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Waxing
/ Oiling
- The impregnation of colorless wax, paraffin and oil in
porous opaque gemstones to improve appearance.