Exam (elaborations)
GIA COLORED STONE ESSENTIALS QUESTIONS AND ANSWERS
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GIA COLORED STONE ESSENTIALS QUESTIONS AND ANSWERS
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Name: Score:61 Multiple choice questions
Definition 1 of 61
An area of weak saturation in a transparent gemstone's bodycolor that usually results from the
way the gem was cut.
mineral
extinction
window
group
Definition 2 of 61
an unusual optical effect displayed by a gem
play-of-color
Chatoyancy
Inorganic
phenomenon
Definition 3 of 61
the appearance of a materials surface in reflected light
Luster
Dispersion
orient
hue
,Definition 4 of 61
A broad flash of color in labradorite feldspar that disappears when the gem is moved.
milk and honey
Labradorescence
Fluorescence
Color zoning
Definition 5 of 61
How well a gemstone resists breaking and chipping and cracking
Luster
organic
trace elements
toughness
Definition 6 of 61
The flashing rainbow colors in opal.
color range
play-of-color
what does color require
amorphous
Definition 7 of 61
The color or colors in a gemstone's color range considered by the trade to be the most
desirable.
adularescence
Dispersion
Fine color
bodycolor
,Definition 8 of 61
A gemstone's ability to withstand wear, heat, and chemicals.
stability
natural gems
transparency
durability
Definition 9 of 61
kinds and relative quantities of atoms that make up a material
natural gems
what does color require
chemical composition
chemical formula
Definition 10 of 61
A distinct change in gem color under different types of lighting.
Color zoning
Fluorescence
color change
color range
, Definition 11 of 61
A subcategory of species, based on color, transparency, or phenomenon. for example when
corundum had trace elements of chromium and is red it is a ruby and when it has trace
elements of iron and titanium it is a blue sapphire
Gem variety
lab-grown gem
Chatoyancy
Aventurescence
Definition 12 of 61
the separation of light into spectral colors
Hardness
Dispersion
play-of-color
Saturation
Definition 13 of 61
color, symmetry, luster, and transparency
what causes blue in sapphire?
what features help classify gems?
quartz chemical formula
main elements of beauty in gemology
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