FIRE - answer✔✔The flashes of color you see in a polished diamond
BRIGHTNESS - answer✔✔The effect of all the diamond's internal and external reflections of
white light
SCINTILLATION - answer✔✔The flashes of light and the contrasting dark areas you see when
the diamond, the light, or the observer moves
CROWN - answer✔✔Top part of the gem above the girdle
GIRDLE - answer✔✔The narrow section of a finished gem that forms the boundary between the
crown and the pavilion and functions as the gem's setting edge
PAVILION - answer✔✔Lower part of a faceted gem below the girdle
FACET - answer✔✔A flat, polished surface on a finished gem
CULET - answer✔✔Small facet at the bottom of a finished gem
BRILLIANT CUT - answer✔✔Cutting style with triangular or kite-shaped facets that radiate
from the center toward the girdle
STANDARD ROUND BRILLIANT - answer✔✔A round brilliant-cut stone with 57 or 58
facets. Often called a full cut
SINGLE CUT - answer✔✔A round stone with 17 or 18 facets
FANCY CUT - answer✔✔Amy gemstone shape other than a standard round brilliant
STEP CUT - answer✔✔A cutting style that features long, narrow facets in rows parallel to the
girdle on both the crown and pavilion
BLEMISHE - answer✔✔Clarity characteristic that's confined to the surface of a polished
gemstone
CLARITY CHARACTERISTICS - answer✔✔The collective term for inclusions and blemishes
LAB-GROWN GEM - answer✔✔A manmade (synthetic) gem with essentially the same
chemical composition, crystal structure, and properties as its natural counterpart
SIMULANT - answer✔✔A natural or manmade material that resembles a gem (also called
imitation)
POINT - answer✔✔One hundredth of a carat (0.01 ct.)
KARAT - answer✔✔A unit of measure for the fineness of gold, abbreviated "K" or "Kt."
DURABILITY - answer✔✔A gemstone's ability to withstand wear, heat, and chemicals
HARDNESS - answer✔✔How well a gemstone resists scratches and abrasion
TOUGHNESS - answer✔✔How well a gemstone resists breaking and chipping
STABILITY - answer✔✔How well a diamond resists chemicals and temperature changes
THERMAL SHOCK - answer✔✔Damage caused by sudden, extreme temperature changes.
LOUPE CLEAN - answer✔✔Describes a diamond that might have surface blemishes but shows
no inclusions under 10X magnification
PIQUÉ - answer✔✔A general term for included stones
APPARENT CLARITY - answer✔✔A term used to describe the effects of treatments on the
visual appeal of a gemstone
FRACTURE FILLING - answer✔✔Treatment that involves injecting a molten glass substance
into a diamond's surface-reaching feathers or laser drill-holes
LASER DRILLING - answer✔✔Treatment that involves using a concentrated beam of laser
light to reach a diamond's dark inclusions and to disguise or eliminate them
BINOCULAR MICROSCOPE - answer✔✔A tabletop magnifier with two eyepieces
LOUPE - answer✔✔A small, portable magnifying lens used for examining gemstones
BRUTING - answer✔✔Forming the basic face-up outline of a round or rounded-shape diamond
to prepare it for faceting
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