GIA COLORED STONE ESSENTIALS WITH COMPLETE SOLUTIONS!
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Course
GIA COLORED STONE
Institution
GIA COLORED STONE
COLORED STONE - ANSWER - Any gem material other than diamond.
GEMOLOGY - ANSWER - The study of gems.
ORGANIC - ANSWER - Once living, or produced by a living organism (plant or animal).
MINERALS - ANSWER - A natural, inorganic substance with a characteristic chemical composition and usually...
CHEMICAL COMPOSITIONS - ANSWER - Kinds and relative quantities of atoms that
make up a material.
DURABILITY - ANSWER - A gemstone's ability to withstand wear, heat, and
chemicals.
LUSTER - ANSWER - The appearance of a material's surface in reflected light.
TRANSPARENCY - ANSWER - Degree to which a material allows light to pass through
it.
HARDNESS - ANSWER - How well a gemstone resists scratches and abrasion.
AMORPHOUS - ANSWER - Lacking a regular crystal structure.
, SPECIES - ANSWER - A broad gem category based on chemical composition and
crystal structure.
VARIETY - ANSWER - A subcategory of species based on color, transparency, or
phenomenon.
TOUGHNESS - ANSWER - How well a gemstone resists breaking, chipping, and
cracking.
FEDERAL TRADE COMMISSION - ANSWER - A US government agency that issues
guidelines for the jewelry trade.
SELECTIVE ABSORPTION - ANSWER - Process by which a material absorbs some
components of visible light and returns others.
HUE - ANSWER - The first impression of an object's basic color.
TONE - ANSWER - Degree of darkness or lightness of a color.
SATURATION - ANSWER - A color's strength or intensity.
BODYCOLOR - ANSWER - A gemstone's basic color, determined by its selective
absorption of light.
COLOR CENTER - ANSWER - A small defect in the atomic structure of a material that
can absorb light and give rise to a color.
COLOR ZONING - ANSWER - Areas of different color in a gem, caused by variations
in growth conditions.
PLEOCHROISM - ANSWER - When a gem shows different bodycolors from different
directions.
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