GIA Colored Stones Assignment 3 Questions and Answers 100% Accurate!
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GIA Colored Stones
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GIA Colored Stones
crystalline minerals - ANSWER - what are classified into seven crystal systems, depending on the symmetry of their unit cells?
exterior shape - ANSWER - what part of a crystal often indicates its symmetry at an atomic level?
rare - ANSWER - What do you call gems that require rare chemical ele...
gia colored stones assignment 3 questions and answ
gia colored stones assignment 3 stuvia
gia colored stones assignment 3 questions and answ
exterior shape answer what part of a crystal
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GIA Colored Stones Assignment
3 Questions and Answers 100%
Accurate!
crystalline minerals - ANSWER - what are classified into seven crystal systems,
depending on the symmetry of their unit cells?
exterior shape - ANSWER - what part of a crystal often indicates its symmetry at an
atomic level?
rare - ANSWER - What do you call gems that require rare chemical elements or
unique geological conditions, or both, to form?
twinning - ANSWER - What can result form a change during crystal growth, or from
cooling or pressure after the crystal has grown?
inclusion - ANSWER - A characteristic enclosed within a gemstone, or reaching its
surface from the interior.
liquid inclusion - ANSWER - Small pocket in a gem that's filled with fluids and,
sometimes, gas bubbles and tiny crystals. Usually created by environmental
changes during crystal growth.
inclusions - ANSWER - What can help identify a colored stone as natural or
manmade, untreated or treated?
large inclusions - ANSWER - What can dramatically affect beauty, value, and
durability?
identify them - ANSWER - What can a gemstone's recognizable crystal shape help
do?
, reaction to external stress - ANSWER - A gem's crystal structure determines its...
aggregate - ANSWER - A mass of tiny, randomly oriented crystals.
microcrystalline - ANSWER - An aggregate made up of individual crystals visible
under magnification.
parting - ANSWER - A flat break in a gemstone caused by concentrated included
minerals parallel to a twinning plane.
specific gravity (SG) - ANSWER - Ratio of the weight of a material to that of an equal
volume of water.
stability - ANSWER - How well a gemstone resists light, heat, and chemicals.
thermal shock - ANSWER - Damage caused by sudden, extreme temperature
changes.
finished stones - ANSWER - The shapes and sizes of rough gem crystals affect the
shapes and sizes of...
gem density and specific gravity - ANSWER - What two things depend on the types
of atoms a gem is made of, and how closely they're packed together?
cleavage, parting, and fracture - ANSWER - The three different ways a gem breaks
are called...
three-phase inclusion - ANSWER - A hollow cavity in a gem, filled with a liquid, a
gas, and one or more crystals.
toughness - ANSWER - How well a gemstone resists breaking and chipping.
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