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Gemstone Enhancement Codes

ne - Not enhanced
re - Routinely enhanced
b - Bleaching
c - Coating
d - Dyeing
f - Filling
h - Heating
hp - Heat & Pressure
i - Impregnating
l - Lasering
o - Oiling/Resin
r - Irradiation
d - Diffusion
w - Waxing/Oiling in opaque stones


 
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