| (N) Natural | (N) Not Enhanced, No Treatments: No modification (or currently has no known modification process).
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(B) Branqueamento
| (B) Bleaching: The use of heat, light and/or other agents to lighten or remove a gemstone’s color.
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(C) Tratamento com película
| (C) Coating: The use of such surface enhancements as lacquering, enameling, inking, foiling or sputtering of films to improve appearance, provide color or add other special effects.
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(F) Preenchimento
| (F) Filling: The filling of surface-breaking cavities or fissures with colorless glass, plastic, solidified borax or similar substances. This process may improve durability and/or appearance, and/or to add weight.
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(H) Tratamento Térmico
| (H) Heating: The use of heat to effect desired alteration of color, clarity and/or phenomena. If residue of foreign substances in open fissures is visible under properly illuminated 10X magnification, H F should be used.
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(HP) Tratamento Térmico com Pressão
| (HP) Heating and Pressure: The use of heat and pressure combined to effect desired alterations of color, clarity and/or phenomena.
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(I) Impregnação
| (I) Impregnation: The impregnation of a porous gemstone with a colorless agent (usually plastic) to improve durability and appearance.
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(O) Impregnação com óleo/resina
| (O) 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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(R ) Irradiação
| (R) Irradiation: The use of neutrons, gamma rays or beta particles (high energy electrons) to alter a gemstone’s color. The irradiation may be followed by a heating process.
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(U) Difusão
| (U) Diffusion: The use of chemicals in conjunction with high temperatures to produce ARTIFICIAL color change and/or asterism-producing inclusions.
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(H+O) Tratamento Térmico + Impregnação com Óleo ou Resina
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(R+H) Irradiação + Tratamento Térmico
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(R+O) Irradiação + Impregnação com Óleo ou Resina
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(D) Tingimento
| (D) 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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(L) Laser
| (L) Lasering: The use of a laser and chemicals to reach and alter inclusions in gemstones, usually diamonds.
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D 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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TRATAMENTOS
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