1 | Page
GIA Colored Stones Exam Actual Questions And Correct
Detailed Answers New Updated Version
An intense, unstable green color can be created in spodumene by -
CORRECT ANSWER=irradiation
2 6
The adularescence of the finest moonstones is - CORRECT ANSWER=blue
mantle - CORRECT ANSWER=The organ that lines the mollusk’s shell, enclosed it’s soft body
20
and contains the cells that form pearl sacs and secrete nacre.
Hatchery Bred - CORRECT ANSWER=Describes mollusks bred in lab tanks and grown in
am
protected areas rather than collected as adults in the wild.
Value Factors - CORRECT ANSWER=Features used to judge the quality and value of pearls.
Ex
Cultured Pearl -CORRECTANSWER=Apearl formed as the result of human intervention in
the formation process.
s
Uniform Strand - CORRECT ANSWER=Anecklace featuring pearls that are very nearly the
rt
same size.
pe
Aragonite -CORRECTANSWER=crystallized form of calcium carbonate found in nacre.
Ex
Processor -CORRECTANSWER=Acompany that prepares cultured pearls for the market.
Conchilolin- CORRECT ANSWER=The organic "glue" in nacre that holds aragonite platelets
together.
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Calcareous Concretion - CORRECT ANSWER=Anon-nacreous natural "pearl."
Surface Chacteristics - CORRECT ANSWER=Blemishes or irregularities confined to a pearls
surface.
Cultured Blister Pearl - CORRECT ANSWER=Acultured pearl grown around a nucleus glued
6
under the mantle tissue inside a mollusk’s shell.
2
20
Pearl Sac - CORRECT ANSWER=Tissue that encloses an implanted bead necleus and mantle
tissue piece, forms a cultured pearl.
Mabe - CORRECT ANSWER=Anassembly composed of a nacre dome, filler, & mother of
pearl backing.
am
Mantle Tissue Piece - CORRECT ANSWER=Asmall square of mantle tissue cut from a donor
Ex
mollusk and implanted in a host mollusk with or without a bead.
By which era has moonstone gone out of style - CORRECT ANSWER=artdeco
ts
The color of chrome diopsideis - CORRECTANSWER=natua
r
pe
Tiny tension cracks in moonstone are called -CORRECTANSWER=ctipedes
Ex
Kunzite's most common color is - CORRECT ANSWER=lightpink
Yellow spodumene is called - CORRECT ANSWER=triphane
The greenish blue feldspar that has grid-like white streaks and resembles turquoise
is -CORRECT ANSWER=amazonite
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The best-known feldspar species that includes moonstone is - CORRECT ANSWER=orthoclase
Which of the following is theonly known commercial source of chrome diopside - CORRECT
ANSWER=russia
6
How many cleavage directions are found in feldspar, spodumene, and diopside - CORRECT
ANSWER=tWO
2
20
Spectrolite is a variety of - CORRECT ANSWER=Labradorite
Coral’s most valuable color is - CORRECT ANSWER=red
am
Which amber color is most valuable - CORRECTANSWER=d
Ex
Which of the following gems is a natural glass - CORRECT ANSWER=Moldavite
Mineral - CORRECT ANSWER=Anatural, inorganic substance with a characteristic chemical
s
composition and usually characteristic structure.
rt
Mixed cut - CORRECT ANSWER=Acutting style that combines brilliant-cut and step cut
pe
facets.
Ex
Abrasions - CORRECT ANSWER=Tiny nicks and pits caused by wear and damage to a gem’s
facet edges or culet.
Absorption spectrum - CORRECTAANSWER=pattern of dark vertical lines or bands shown by
certain gems when viewed through a spectroscope.
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Adularescence - CORRECT ANSWER=The cloudy bluish white light in a moonstone, caused by
scattering of light.
Agate - CORRECT ANSWER=Chalcedony with a curved or angular bands or layers that differ
in color and transparency .
6
Aggregate -CORRECTANSWER=Amass of tiny, randomly oriented crystals.
2
20
Akoya - CORRECT ANSWER=Common name for the Pinctada fucata oyster and the natural or
cultured pearls it produces.
am
Allochromatic -CORRECTANSWER=gem colored by trace elements in its crystal structure.
Alluvial deposit - CORRECT ANSWER=Adeposit where gems are eroded from their source
rock, then transported away from their source and further concentrated.
Ex
Amorphous - CORRECT ANSWER=Lacking a regular crystal structure
ts
Aragonite - CORRECT ANSWER=Acrystalized form of calcium carbonate found in nacre.
r
pe
Assembled stone - CORRECT ANSWER=Two or more separate pieces of material joined to
form a unit.
Ex
Asterism - CORRECT ANSWER=Crossing of chatoyant bands, creating a star in the dome of
cabochon.
Atom - CORRECT ANSWER=The basic structural unit of all matter.
GIA Colored Stones Exam Actual Questions And Correct
Detailed Answers New Updated Version
An intense, unstable green color can be created in spodumene by -
CORRECT ANSWER=irradiation
2 6
The adularescence of the finest moonstones is - CORRECT ANSWER=blue
mantle - CORRECT ANSWER=The organ that lines the mollusk’s shell, enclosed it’s soft body
20
and contains the cells that form pearl sacs and secrete nacre.
Hatchery Bred - CORRECT ANSWER=Describes mollusks bred in lab tanks and grown in
am
protected areas rather than collected as adults in the wild.
Value Factors - CORRECT ANSWER=Features used to judge the quality and value of pearls.
Ex
Cultured Pearl -CORRECTANSWER=Apearl formed as the result of human intervention in
the formation process.
s
Uniform Strand - CORRECT ANSWER=Anecklace featuring pearls that are very nearly the
rt
same size.
pe
Aragonite -CORRECTANSWER=crystallized form of calcium carbonate found in nacre.
Ex
Processor -CORRECTANSWER=Acompany that prepares cultured pearls for the market.
Conchilolin- CORRECT ANSWER=The organic "glue" in nacre that holds aragonite platelets
together.
,2 | Page
Calcareous Concretion - CORRECT ANSWER=Anon-nacreous natural "pearl."
Surface Chacteristics - CORRECT ANSWER=Blemishes or irregularities confined to a pearls
surface.
Cultured Blister Pearl - CORRECT ANSWER=Acultured pearl grown around a nucleus glued
6
under the mantle tissue inside a mollusk’s shell.
2
20
Pearl Sac - CORRECT ANSWER=Tissue that encloses an implanted bead necleus and mantle
tissue piece, forms a cultured pearl.
Mabe - CORRECT ANSWER=Anassembly composed of a nacre dome, filler, & mother of
pearl backing.
am
Mantle Tissue Piece - CORRECT ANSWER=Asmall square of mantle tissue cut from a donor
Ex
mollusk and implanted in a host mollusk with or without a bead.
By which era has moonstone gone out of style - CORRECT ANSWER=artdeco
ts
The color of chrome diopsideis - CORRECTANSWER=natua
r
pe
Tiny tension cracks in moonstone are called -CORRECTANSWER=ctipedes
Ex
Kunzite's most common color is - CORRECT ANSWER=lightpink
Yellow spodumene is called - CORRECT ANSWER=triphane
The greenish blue feldspar that has grid-like white streaks and resembles turquoise
is -CORRECT ANSWER=amazonite
,3 | Page
The best-known feldspar species that includes moonstone is - CORRECT ANSWER=orthoclase
Which of the following is theonly known commercial source of chrome diopside - CORRECT
ANSWER=russia
6
How many cleavage directions are found in feldspar, spodumene, and diopside - CORRECT
ANSWER=tWO
2
20
Spectrolite is a variety of - CORRECT ANSWER=Labradorite
Coral’s most valuable color is - CORRECT ANSWER=red
am
Which amber color is most valuable - CORRECTANSWER=d
Ex
Which of the following gems is a natural glass - CORRECT ANSWER=Moldavite
Mineral - CORRECT ANSWER=Anatural, inorganic substance with a characteristic chemical
s
composition and usually characteristic structure.
rt
Mixed cut - CORRECT ANSWER=Acutting style that combines brilliant-cut and step cut
pe
facets.
Ex
Abrasions - CORRECT ANSWER=Tiny nicks and pits caused by wear and damage to a gem’s
facet edges or culet.
Absorption spectrum - CORRECTAANSWER=pattern of dark vertical lines or bands shown by
certain gems when viewed through a spectroscope.
, 4 | Page
Adularescence - CORRECT ANSWER=The cloudy bluish white light in a moonstone, caused by
scattering of light.
Agate - CORRECT ANSWER=Chalcedony with a curved or angular bands or layers that differ
in color and transparency .
6
Aggregate -CORRECTANSWER=Amass of tiny, randomly oriented crystals.
2
20
Akoya - CORRECT ANSWER=Common name for the Pinctada fucata oyster and the natural or
cultured pearls it produces.
am
Allochromatic -CORRECTANSWER=gem colored by trace elements in its crystal structure.
Alluvial deposit - CORRECT ANSWER=Adeposit where gems are eroded from their source
rock, then transported away from their source and further concentrated.
Ex
Amorphous - CORRECT ANSWER=Lacking a regular crystal structure
ts
Aragonite - CORRECT ANSWER=Acrystalized form of calcium carbonate found in nacre.
r
pe
Assembled stone - CORRECT ANSWER=Two or more separate pieces of material joined to
form a unit.
Ex
Asterism - CORRECT ANSWER=Crossing of chatoyant bands, creating a star in the dome of
cabochon.
Atom - CORRECT ANSWER=The basic structural unit of all matter.
