GIA Colored Stones Assignment 6 Questions and Answers.
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GIA Colored Stones
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GIA Colored Stones
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 ...
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?
quench crackling - ANSWER - A rapid heating and cooling process that produces
fractures in a stone so it will accept dye.
reducing environment - ANSWER - An oxygen-poor environment that surrounds a
gem during heat treatment, causing it to lose oxygen.
resin - ANSWER - A clear, viscous substance that's used to fill fractures in
gemstones.
bleaching - ANSWER - What is a fairly common pearl treatment?
, jadeite - ANSWER - What is often treated with a combination of bleaching and
impregnation?
dyeing - ANSWER - What is one of the oldest gem treatments?
commonly dyed gems - ANSWER - Cultured pearl, lapis lazuli, chalcedony, and coral
are examples of...
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.
bleaching - ANSWER - A treatment that uses chemicals to lighten or remove color.
colorless impregnation - ANSWER - Filling of pores or other openings with melted
wax, resin, polymer, or plastic to improve appearance and stability.
hardener - ANSWER - A chemical that treaters mix with some resins to cause them
to solidify.
refractive index as the gem. - ANSWER - For effective clarity enhancement, the
material used to fill a gem's fractures must have nearly the same...
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