Exam (elaborations)
ALL GIA COLOURED STONES QUESTIONS AND ANSWERS
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ALL GIA COLOURED STONES QUESTIONS AND ANSWERS
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Name: Score:150 Multiple choice questions
Term 1 of 150
Today, the chosen sales outlets for premium-quality colored stones are
retail chain stores.
TV-shopping networks.
international auction houses.
direct purchases from gem cutters.
Term 2 of 150
Heat treatment in a reducing environment can
create golden color in beryl.
lighten blue color in sapphire.
deepen blue color in sapphire.
deepen red color in tourmaline.
Term 3 of 150
Most gemstones form in the
core.
mantle.
oceanic crust.
continental crust.
,Term 4 of 150
A quantity of stones of similar or mixed qualities, from a single mine or from various sources,
offered for sale together is called a
parcel.
mine lot.
mine run.
production run.
Term 5 of 150
Synthetic gem materials
are organic.
are not minerals.
are usually amorphous.
are classified as minerals.
Term 6 of 150
Which type of twinning is caused by environmental change after the gem forms?
Cyclic
Primary
Penetration
Polysynthetic
,Term 7 of 150
Which continent is seen as the major source of present and future production, yielding a
wealth of colored stone varieties?
Asia
Africa
Australia
North America
Term 8 of 150
Low cost and high volume characterize which process?
Pulling
Flux growth
Flame fusion
Hydrothermal growth
Term 9 of 150
A city, region, or country with a large number of gemstone manufacturers is called a
gem hub.
cutting center.
cutting capital.
trading cooperative.
Term 10 of 150
Which gem forms by metamorphism?
Opal
Red beryl
Turquoise
Tanzanite
, Term 11 of 150
Which group does almandite belong to
Spinel
Garnet
Feldspar
Tourmaline
Term 12 of 150
Jadeite is often
irradiated.
irradiated and annealed.
surface diffusion treated.
bleached and polymer impregnated.
Term 13 of 150
A gem's origin refers to
its age.
how it formed.
whether it is natural, synthetic, or treated.
the geographical place where it was mined.
Term 14 of 150
Materials cut free-size are usually
synthetics.
manmade imitations.
large, important stones.
commercial-quality gems.
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