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22 Cards in this Set

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