Exam (elaborations)
GIA COLORED GEMSTONES QUESTIONS AND ANSWERS
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GIA COLORED GEMSTONES QUESTIONS AND ANSWERS
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Name: Score:59 Multiple choice questions
Term 1 of 59
Which of the following is a price for buying an entire parcel of gems, or a substantial part of it
(7)?
Lot price
Cut price
Pick price
Grade price
Term 2 of 59
Excessive bulge on a step cut (9):
adds weight
adds beauty
increases brilliance
makes mounting easier
Term 3 of 59
Which term describes a random sample from a parcel of gemstones, often used to assess the
parcel's overall quality (7)?
Cut
Lot
Pick
Grade
,Term 4 of 59
Inclusions are important to gemologists because they (10):
usually increase a gem's value
usually create attractive phenomena
always identify a gem's geographic origin
can help separate natural from synthetic gems.
Term 5 of 59
A characteristic or irregularity confined to the surface of a polished gemstone is a(n) (10)
cavity
blemish
fracture
inclusion
Term 6 of 59
Translucent to opaque rough is often cut into a (9):
step cut
buff top
cabochon
brilliant cut
Term 7 of 59
Extinction results from (8):
mixed cuts
deep pavilions
shallow proportions
excellent proportions
,Term 8 of 59
What is Myanmar's most important gem export(7)?
Ruby
Spinel
Jadeite
Sapphire
Term 9 of 59
What two coloring agents are usually responsible for color change in gemstones (8)?
Copper and iron
Iron and titanium
Cobalt and titanium
Chromium and vanadium
Term 10 of 59
What type of lighting is best for grading color in a colored stone (8)?
Halogen
Incandescent
High red content
Daylight equivalent fluorescent
Term 11 of 59
The market sector where better quality gemstones are used in well-finished, moderately
proved jewelry is known as the (7)
mass market
middle market
high-end market
commercial market
, Term 12 of 59
Which colored stone variety has cutting challenges due to vulnerable cleavage planes (9)?
Tsavorite
Tanzanite
Rhodolite
Alexandrite
Term 13 of 59
Removing heavily included sections from gemstone rough by carefully tapping it with a small
hammer is known as (9):
cabbing
cobbing
grinding
polishing
Term 14 of 59
Where is rough from in Mogok brought into Thailand (7)?
Pailin
Mae Sai
Mae Sot
Bo Phloi
Term 15 of 59
Which cutting stage has the greatest impact on the value of the finished gem (9)?
Sawing
Cobbing
Polishing
Preforming
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