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22 Cards in this Set
- Front
- Back
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Bleaching
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chemicals to lighten/remove color
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Cavity Filling
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fills/seals voids to improve appearance & add weight
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Colorless Impregnation
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fills pores/openings w/ melted wax, resin, polymer, plastic to improve appearance & stability
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Disclosure
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clearly & accurately informing re:nature of goods
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Doublet
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2 separate pieces fused/cemented together
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Dyeing
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adds/affects color by deepening, evening, changing it
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Ethics
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rules or standards governing personal or professional conduct
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Flame Fusion
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powdered chemicals dropped through flame onto rotating pedestal
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Flux Growth
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nutrients dissolved in heated chemicals, cooled
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Fracture (fissure) Filling
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filler concels fractures & improve clarity
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Heat Treatment
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rising temperatures, changes appearance
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Hydrothermal Growth
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nutrients dissolved in water solution, high temperature & pressure, cooled
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Imitation Gem
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looks like natural & used in its place
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Irradiation
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radiation change/improve color
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Lattice Diffusion
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high temperatures & chemicals, penetration of color-causing elements
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Pulling
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seed dipped into chemical melt, pulled away as it gathers material
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Quench Crackling
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rapid heat/cool, fractures, accepts dye
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Smoke Treatment
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heating wrapped opal, smoke/ash penetrates & darkens & improves play-of-color
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Sugar Treatment
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Soaking opal in hot sugar solution & then sulfuric acid to darken & play-of-color
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Surface Modification
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backing, coating, painting to change appearance
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Treatment
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human-controlled process (not cut & polish) improves appearance, durability, value
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Triplet
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3 separate pieces fused or cemented
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