Exam (elaborations)
GIA COLORED STONES ASSIGNMENT 6 QUESTIONS AND ANSWERS
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GIA COLORED STONES ASSIGNMENT 6 QUESTIONS AND ANSWERS
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Name: Score:45 Multiple choice questions
Definition 1 of 45
What is an organic gem that is commonly heat-treated?
amber
red
jadeite
opal
Definition 2 of 45
Commonly irradiated gems include,
topaz, tourmaline, cultured pearl
colorless impregnation
irradiated, heat, light
synthetic corundum
Definition 3 of 45
An oxygen-rich environment that surrounds a gem during heat treatment, causing it to absorb
oxygen.
absence of appropriate enzymes
reducing environment
oxidizing environment
copi-coated vesicles
,Definition 4 of 45
Treatments that improve gem appearance and quality increase the supply of...
titanium oxide and iron oxide
commercially important gems
treatment
commonly dyed gems
Definition 5 of 45
Exposing a gem to radiation to change or improve its color.
pasteurization
ionization
filtration
irradiation
Definition 6 of 45
Altering a gem's appearance by applying backings, coatings, or coloring agents like paint.
spallation
heat treatment
fracture filling
surface modification
Definition 7 of 45
Treaters use sugar treatment to enhance...
emeralds
topaz
opal
amber
,Definition 8 of 45
Almost all ______________ on the market today are fracture filled.
diamonds
rubies
emeralds
sapphires
Definition 9 of 45
For effective clarity enhancement, the material used to fill a gem's fractures must have nearly
the same...
hardness as the gem.
density as the gem.
refractive index as the gem.
color as the gem.
Definition 10 of 45
Quartz or topaz with a thin layer of gold deposited on the surface is known as...
lemon
madeira
titanium oxide
aqua aura
Definition 11 of 45
A chemical that treaters mix with some resins to cause them to solidify.
resin
polymer
hardener
quench crackling
, Definition 12 of 45
Jadeite is often...
irradiated, heat, light
irradiated.
bleached and polymer impregnated
surface-diffusion treated.
Definition 13 of 45
Soaking an opal in a hot sugar solution and then in sulfuric acid to darken it and bring out its
play-of-color.
irradiation
heat treatment
smoke treatment
sugar treatment
Definition 14 of 45
Which of these is considered a gem treatment, cutting, polishing, or fracture filling?
fracture filling
laser drilling
lattice diffusion
heat treatment
Definition 15 of 45
Corundum, tanzanite, zircon, topaz, aquamarine, and amber.
disclosed
gems that are commonly heat treated
bleaching
commonly dyed gems
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