1
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GIA Colored Stones Questions and
Answers (100% Correct Answers) Already
Graded A+
Gems [ANS:] Most _____ are minerals
United States and Mexico [ANS:] Chrysocolla-in-chalcedony
sources include the __________ & _____________
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Uruguay [ANS:] Fine-quality agate comes from Mexico, Brazil, and
__________
Iris [ANS:] _____ agate is a lovely phenomenal variety of agate. It's
Guru01 - Stuvia
semitransparent to translucent and shows iridescent colors when
light is transmitted through thin slices.
Mineral [ANS:] To be gem, a _____ must be beautiful, durable, and
rare
Chinese red [ANS:] ______ ____ agate, commonly called southern
red agate in the trade; usually has intense red, white, or grayish
color bands.
precious and common [ANS:] There are two broad opal
categories: _________ and _________
Syntectonic and Redox [ANS:] The 4 most representative Opal
Formation models are the Weathering theory, the Microbe theory,
the ________ theory, and the _______ theory.
White [ANS:] ________ opal—Background color ranges from
translucent white to medium gray; shows play-of-color
, 2
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Crystal [ANS:] _________ opal—Background ranges from
transparent to semitransparent; shows exceptional play-of-color
common [ANS:] Precious opal displays characteristic flashes of
rainbow colors, called play-of-color, while _______ opal—also
known as potch opal—does not. _________ opal, which can occur
in attractive colors that make it highly desirable to consumers, is
more widespread than precious opal.
Water [ANS:] ________ opal (Jelly opal)—Background ranges from
transparent to translucent; shows faint play-of-color or no play-of-
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color at all
Nucleus Visible [ANS:] _________ ________ —The cultured pearl
shows evidence of its bead nucleus through the nacre
Guru01 - Stuvia
Good [ANS:] ________ Luster - Reflections are bright but not sharp
and slightly hazy around the edges (Pearls)
Neutrals, Near-Neutrals, & Hues [ANS:] GIA groups Pearl
bodycolors into three types:
Name [ANS:] An appealing ________ can make a gem much
easier to sell
Source Country [ANS:] Changes that take place in gem's
____________________ can drastically affect its availability and price
Treatments [ANS:] ____________ improve the marketability and
availability of many gems.
Emerald [ANS:] In spite of treatment that is sometimes extensive,
_________ is the number one colored stone by value imported into
the US.
, 3
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Gem Treatments [ANS:] Many consumers accept
_____________________ if they're ethically disclosed and explained
in a positive way.
Amorphous [ANS:] Lacking a regular crystal structure
Atom [ANS:] The basic structure of all matter
Chemical Composition [ANS:] Kinds and relative quantities of
atoms that make up a material.
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Chemical Element [ANS:] A substance that consists of atoms of
only one kind
Crystal Structure [ANS:] Regular, repeating internal arrangement
Guru01 - Stuvia
of atoms in a material.
Disclosure [ANS:] Clearly and accurately informing customers
about the nature of the goods they buy
Facet [ANS:] A flat, polished surface on a finished gem
Gem Species [ANS:] A broad gem category based on chemical
composition and crystal structure
Gem Variety [ANS:] A subcategory of species, based on color,
transparency, or phenomenon
Group [ANS:] A family of gems from several closely related mineral
species
Inorganic [ANS:] Composed of, or arising from, non-living matter
Mineral [ANS:] A natural, inorganic substance with a characteristic
chemical composition and usually characteristic structure.
, 4
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Natural Gems [ANS:] Gems produced by natural processes
without human help
Organic [ANS:] Produced by, or derived from, a living organism
Phenomenon [ANS:] An unusual optical effect displayed by a
gem
Rock [ANS:] A natural material composed of masses of mineral
crystals of one or more kinds
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Silicate [ANS:] A mineral that contains the element silicon and
oxygen
Source [ANS:] A gem-producing country or area, or a particular
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mine in that area
Tanzanite [ANS:] In the 1960s, Tiffany & Co created a marketing
campaign for ___________ that inspired demand for the newly
discovered gem
Raw Materials [ANS:] Rocks are the _______________ of gemstone
formations
Crust [ANS:] Most gemstones form in the earth's continental
_________
mountain [ANS:] Geological conditions during ___________ building
are favorable for gem formation
slow [ANS:] In most igneous rocks, large crystals indicate ______
cooling
rapid [ANS:] In most igneous rocks, small crystals indicate ______
cooling
For Expert help and assignment solutions, +254707240657
GIA Colored Stones Questions and
Answers (100% Correct Answers) Already
Graded A+
Gems [ANS:] Most _____ are minerals
United States and Mexico [ANS:] Chrysocolla-in-chalcedony
sources include the __________ & _____________
© 2025 Assignment Expert
Uruguay [ANS:] Fine-quality agate comes from Mexico, Brazil, and
__________
Iris [ANS:] _____ agate is a lovely phenomenal variety of agate. It's
Guru01 - Stuvia
semitransparent to translucent and shows iridescent colors when
light is transmitted through thin slices.
Mineral [ANS:] To be gem, a _____ must be beautiful, durable, and
rare
Chinese red [ANS:] ______ ____ agate, commonly called southern
red agate in the trade; usually has intense red, white, or grayish
color bands.
precious and common [ANS:] There are two broad opal
categories: _________ and _________
Syntectonic and Redox [ANS:] The 4 most representative Opal
Formation models are the Weathering theory, the Microbe theory,
the ________ theory, and the _______ theory.
White [ANS:] ________ opal—Background color ranges from
translucent white to medium gray; shows play-of-color
, 2
For Expert help and assignment solutions, +254707240657
Crystal [ANS:] _________ opal—Background ranges from
transparent to semitransparent; shows exceptional play-of-color
common [ANS:] Precious opal displays characteristic flashes of
rainbow colors, called play-of-color, while _______ opal—also
known as potch opal—does not. _________ opal, which can occur
in attractive colors that make it highly desirable to consumers, is
more widespread than precious opal.
Water [ANS:] ________ opal (Jelly opal)—Background ranges from
transparent to translucent; shows faint play-of-color or no play-of-
© 2025 Assignment Expert
color at all
Nucleus Visible [ANS:] _________ ________ —The cultured pearl
shows evidence of its bead nucleus through the nacre
Guru01 - Stuvia
Good [ANS:] ________ Luster - Reflections are bright but not sharp
and slightly hazy around the edges (Pearls)
Neutrals, Near-Neutrals, & Hues [ANS:] GIA groups Pearl
bodycolors into three types:
Name [ANS:] An appealing ________ can make a gem much
easier to sell
Source Country [ANS:] Changes that take place in gem's
____________________ can drastically affect its availability and price
Treatments [ANS:] ____________ improve the marketability and
availability of many gems.
Emerald [ANS:] In spite of treatment that is sometimes extensive,
_________ is the number one colored stone by value imported into
the US.
, 3
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Gem Treatments [ANS:] Many consumers accept
_____________________ if they're ethically disclosed and explained
in a positive way.
Amorphous [ANS:] Lacking a regular crystal structure
Atom [ANS:] The basic structure of all matter
Chemical Composition [ANS:] Kinds and relative quantities of
atoms that make up a material.
© 2025 Assignment Expert
Chemical Element [ANS:] A substance that consists of atoms of
only one kind
Crystal Structure [ANS:] Regular, repeating internal arrangement
Guru01 - Stuvia
of atoms in a material.
Disclosure [ANS:] Clearly and accurately informing customers
about the nature of the goods they buy
Facet [ANS:] A flat, polished surface on a finished gem
Gem Species [ANS:] A broad gem category based on chemical
composition and crystal structure
Gem Variety [ANS:] A subcategory of species, based on color,
transparency, or phenomenon
Group [ANS:] A family of gems from several closely related mineral
species
Inorganic [ANS:] Composed of, or arising from, non-living matter
Mineral [ANS:] A natural, inorganic substance with a characteristic
chemical composition and usually characteristic structure.
, 4
For Expert help and assignment solutions, +254707240657
Natural Gems [ANS:] Gems produced by natural processes
without human help
Organic [ANS:] Produced by, or derived from, a living organism
Phenomenon [ANS:] An unusual optical effect displayed by a
gem
Rock [ANS:] A natural material composed of masses of mineral
crystals of one or more kinds
© 2025 Assignment Expert
Silicate [ANS:] A mineral that contains the element silicon and
oxygen
Source [ANS:] A gem-producing country or area, or a particular
Guru01 - Stuvia
mine in that area
Tanzanite [ANS:] In the 1960s, Tiffany & Co created a marketing
campaign for ___________ that inspired demand for the newly
discovered gem
Raw Materials [ANS:] Rocks are the _______________ of gemstone
formations
Crust [ANS:] Most gemstones form in the earth's continental
_________
mountain [ANS:] Geological conditions during ___________ building
are favorable for gem formation
slow [ANS:] In most igneous rocks, large crystals indicate ______
cooling
rapid [ANS:] In most igneous rocks, small crystals indicate ______
cooling
