GIA Diamond Essential – Complete Study Guide
CROWN Right Ans - Top part of the gem above the girdle
GIRDLE Right Ans - 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 Right Ans - Lower part of a faceted gem below the girdle
FACET Right Ans - A flat, polished surface on a finished gem
CULET Right Ans - Small facet at the bottom of a finished gem
FIRE Right Ans - The flashes of color you see in a polished diamond
BRIGHTNESS Right Ans - The effect of all the diamond's internal and
external reflections of white light
SCINTILLATION Right Ans - The flashes of light and the contrasting dark
areas you see when the diamond, the light, or the observer moves
BRILLIANT CUT Right Ans - Cutting style with triangular or kite-shaped
facets that radiate from the center toward the girdle
STANDARD ROUND BRILLIANT Right Ans - A round brilliant-cut stone
with 57 or 58 facets. Often called a full cut
SINGLE CUT Right Ans - A round stone with 17 or 18 facets
FANCY CUT Right Ans - Amy gemstone shape other than a standard round
brilliant
STEP CUT Right Ans - A cutting style that features long, narrow facets in
rows parallel to the girdle on both the crown and pavilion
BAGUETTE Right Ans - A small, four-sided step cut that's rectangular,
square, or tapered
, MIXED CUT Right Ans - Cut that combines brilliant-cut and step-cut styles
BRANDED CUTS Right Ans - Cutting style that's developed, named, and
promoted by a specific manufacturer
INCLUSION Right Ans - Clarity characteristic totally enclosed in a polished
gemstone or extending into it from the surface
BLEMISHE Right Ans - Clarity characteristic that's confined to the surface
of a polished gemstone
CLARITY CHARACTERISTICS Right Ans - The collective term for inclusions
and blemishes
LAB-GROWN GEM Right Ans - A manmade (synthetic) gem with essentially
the same chemical composition, crystal structure, and properties as its natural
counterpart
SIMULANT Right Ans - A natural or manmade material that resembles a
gem (also called imitation)
POINT Right Ans - One hundredth of a carat (0.01 ct.)
KARAT Right Ans - A unit of measure for the fineness of gold, abbreviated
"K" or "Kt."
DURABILITY Right Ans - A gemstone's ability to withstand wear, heat, and
chemicals
HARDNESS Right Ans - How well a gemstone resists scratches and abrasion
TOUGHNESS Right Ans - How well a gemstone resists breaking and
chipping
STABILITY Right Ans - How well a diamond resists chemicals and
temperature changes
CROWN Right Ans - Top part of the gem above the girdle
GIRDLE Right Ans - 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 Right Ans - Lower part of a faceted gem below the girdle
FACET Right Ans - A flat, polished surface on a finished gem
CULET Right Ans - Small facet at the bottom of a finished gem
FIRE Right Ans - The flashes of color you see in a polished diamond
BRIGHTNESS Right Ans - The effect of all the diamond's internal and
external reflections of white light
SCINTILLATION Right Ans - The flashes of light and the contrasting dark
areas you see when the diamond, the light, or the observer moves
BRILLIANT CUT Right Ans - Cutting style with triangular or kite-shaped
facets that radiate from the center toward the girdle
STANDARD ROUND BRILLIANT Right Ans - A round brilliant-cut stone
with 57 or 58 facets. Often called a full cut
SINGLE CUT Right Ans - A round stone with 17 or 18 facets
FANCY CUT Right Ans - Amy gemstone shape other than a standard round
brilliant
STEP CUT Right Ans - A cutting style that features long, narrow facets in
rows parallel to the girdle on both the crown and pavilion
BAGUETTE Right Ans - A small, four-sided step cut that's rectangular,
square, or tapered
, MIXED CUT Right Ans - Cut that combines brilliant-cut and step-cut styles
BRANDED CUTS Right Ans - Cutting style that's developed, named, and
promoted by a specific manufacturer
INCLUSION Right Ans - Clarity characteristic totally enclosed in a polished
gemstone or extending into it from the surface
BLEMISHE Right Ans - Clarity characteristic that's confined to the surface
of a polished gemstone
CLARITY CHARACTERISTICS Right Ans - The collective term for inclusions
and blemishes
LAB-GROWN GEM Right Ans - A manmade (synthetic) gem with essentially
the same chemical composition, crystal structure, and properties as its natural
counterpart
SIMULANT Right Ans - A natural or manmade material that resembles a
gem (also called imitation)
POINT Right Ans - One hundredth of a carat (0.01 ct.)
KARAT Right Ans - A unit of measure for the fineness of gold, abbreviated
"K" or "Kt."
DURABILITY Right Ans - A gemstone's ability to withstand wear, heat, and
chemicals
HARDNESS Right Ans - How well a gemstone resists scratches and abrasion
TOUGHNESS Right Ans - How well a gemstone resists breaking and
chipping
STABILITY Right Ans - How well a diamond resists chemicals and
temperature changes
