GIA COLORED STONE ESSENTIALS QUESTIONS AND CORRECT SOLUTIONS 100%
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Course
GIA Colored Stones
Institution
GIA Colored Stones
GIA COLORED STONE ESSENTIALS QUESTIONS AND
CORRECT SOLUTIONS 100%
commercially important gems Treatments that improve gem appearance and quality increase the
supply of...
available, affordable Treatments that make gems more _____________ and ____________ are an
important part of today's gem...
GIA COLORED STONE ESSENTIALS QUESTIONS AND
CORRECT SOLUTIONS 100%
commercially important gems Treatments that improve gem appearance and quality increase the
supply of...
available, affordable Treatments that make gems more _____________ and ____________ are an
important part of today's gem and jewelry market.
disclosed All treatments, even suspected or probable treatments, should be ______________ as
part of every transaction.
gems that are commonly heat treated Corundum, tanzanite, zircon, topaz, aquamarine, and
amber.
heat treatment What can alter color and create or eliminate phenomena and inclusions?
lattice diffusion with titanium What produces a shallow layer of color that can be removed with
minor repolishing?
beryllium, penetrate The color resulting from lattice diffusion with _______________, might
______________ the entire stone.
emeralds Almost all ______________ on the market today are fracture filled.
irradiated, heat, light ____________ color is not always stable and exposure to _________ or
__________ can destroy it.
topaz, tourmaline, cultured pearl Commonly irradiated gems include,
bleaching What is a fairly common pearl treatment?
, GIA COLORED STONE ESSENTIALS QUESTIONS AND
CORRECT SOLUTIONS 100%
species or variety You should judge a gemstone's beauty and value only by comparing it with
others of its own ___________ or ___________.
large stones _____________ ____________with fine color are more common in some colored
stone species than in others.
pure hues In many gemstone varieties, _________ _____ are more valued than mixed hues.
shouldn't You __________________ use trade terms that imply a gem's geographic origin if you
can't be sure of its actual source.
face-up color The way a gem is cut can have a dramatic effect on its ___________-___
_________.
value The cutter's main goal is to produce a stone with the highest possible __________.
proportions If rough is very valuable, cutters often compromise on ______________ to save
weight and avoid loss of money.
extinction windowing Cutting compromises that save weight can also cause _____________
and/or _____________.
comparison stones color samples When you can't control the lighting conditions in a buying
situation, use your own _____________ ___________ or ___________ _____________.
consistent procedures ______________ _____________ are very important when grading
colored stones.
identity Know a gem's _____________ before you grade it.
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