GIA Colored Stones Assignment
6 Questions and Answers
commercially important gems - ANSWER - Treatments that improve gem
appearance and quality increase the supply of...
available, affordable - ANSWER - Treatments that make gems more _____________
and ____________ are an important part of today's gem and jewelry market.
disclosed - ANSWER - All treatments, even suspected or probable treatments, should
be ______________ as part of every transaction.
gems that are commonly heat treated - ANSWER - Corundum, tanzanite, zircon,
topaz, aquamarine, and amber.
heat treatment - ANSWER - What can alter color and create or eliminate phenomena
and inclusions?
lattice diffusion with titanium - ANSWER - What produces a shallow layer of color
that can be removed with minor repolishing?
beryllium, penetrate - ANSWER - The color resulting from lattice diffusion with
_______________, might ______________ the entire stone.
emeralds - ANSWER - Almost all ______________ on the market today are fracture
filled.
irradiated, heat, light - ANSWER - ____________ color is not always stable and
exposure to _________ or __________ can destroy it.
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