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EXAM - GIA Colored Stones Exam|684+ Questions with Complete Solutions
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EXAM - GIA Colored Stones Exam|684+ Questions with Complete Solutions
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EXAM - GIA Colored Stones Exam|684+ Questions withComplete Solutions
Mineral Correct-A natural, inorganic substance with a characteristic chemical composition
and usually characteristic structure.
Mixed cut Correct-A cutting style that combines brilliant-cut and step cut facets.
Abrasions Correct-Tiny nicks and pits caused by wear and damage to a gem's facet edges
or culet.
Absorption spectrum Correct-A pattern of dark vertical lines or bands shown by certain
gems when viewed through a spectroscope.
Adularescence Correct-The cloudy bluish white light in a moonstone, caused by scattering
of light.
Agate Correct-Chalcedony with a curved or angular bands or layers that differ in color and
transparency .
Aggregate Correct-A mass of tiny, randomly oriented crystals.
, EXAM - GIA Colored Stones Exam|684+ Questions with
Complete Solutions
Akoya Correct-Common name for the Pinctada fucata oyster and the natural or cultured
pearls it produces.
Allochromatic Correct-A gem colored by trace elements in its crystal structure.
Alluvial deposit Correct-A deposit where gems are eroded from their source rock, then
transported away from their source and further concentrated.
Amorphous Correct-Lacking a regular crystal structure.
Aragonite Correct-A crystalized form of calcium carbonate found in nacre.
Assembled stone Correct-Two or more separate pieces of material joined to form a unit.
Asterism Correct-Crossing of chatoyant bands, creating a star in the dome of cabochon.
, EXAM - GIA Colored Stones Exam|684+ Questions with
Complete Solutions
Atom Correct-The basic structural unit of all matter.
Aventurescence Correct-A glittery effect caused by light reflecting from small, flat
inclusions within a gemstone.
Background color Correct-An opal's bodycolor, independent of its play-of-color.
Bead nucleus Correct-A bead used as the core of a cultured pearl, usually made from a
freshwater mussel shell.
Bleaching Correct-A treatment that uses chemicals to lighten or remove color.
Blemish Correct-Characteristic or irregularity confined to the surface of a polished
gemstone.
Blue Sheen Correct-Trade term for a highly prized, vivid blue adularescence displayed by
the finest moonstone.
, EXAM - GIA Colored Stones Exam|684+ Questions with
Complete Solutions
Bodycolor Correct-A gemstone's basic color, determined by its selective absorption of
light.
Botryoidal Correct-A crystal growth habit with a bumpy appearance similar to a bunch of
grapes.
Boulder opal Correct-Thin layers of precious opal, cut to include matrix.
Boule Correct-A cylindrical synthetic crystal produced by the flame-fusion process.
Brilliance Correct-Light that eventually returns to the eye after entering a gem through the
crown, reflecting off its pavilion facets, and exiting back through the crown.
Brilliant cut Correct-Cutting style with triangular or kite-shaped facets that radiate from
the center toward girdle.
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