GIA COLORED STONES CORRECT EXAM TEST
PAPER QUESTIONS AND ANSWERS SURE A+
✔✔Sun spangles - ✔✔Circular marks sometimes left in amber when treaters heat and
oil it.
✔✔Surface characteristics - ✔✔Blemishes or irregularities confined to a pearls surface.
✔✔Surface modification - ✔✔Altering a gem's appearance by applying backings,
coating, or coloring agents like paint.
✔✔Symmetry - ✔✔The precision and balance of the corresponding parts of a finished
gem.
✔✔Synthetic gem - ✔✔A laboratory creation with essentially the same chemical
composition, crystal structure, and properties as its natural counterpart.
✔✔Table facet - ✔✔Facet at the top of the crown, usually the largest facet on the stone.
✔✔Thermal shock - ✔✔Damage caused by sudden, extreme temperature changes.
✔✔Three-phase inclusion - ✔✔A hollow cavity in a gem, filled with a liquid, a gas, and
one or more crystals.
,✔✔Three-quarter-cut - ✔✔Cultured pearl with any unsightly portion cut or ground off.
✔✔Tone - ✔✔Degree of darkness or lightness of a color.
✔✔Tourmalinated quartz - ✔✔A type of sagenitic quartz containing needle-like or rod-
like tourmaline inclusions.
✔✔Trace elements - ✔✔Atoms in a gem that aren't part of its essential chemical
composition.
✔✔Trade terms - ✔✔Terms often used in the jewelry industry to describe particular
gemstone colors or links gems with specific geographic locations.
✔✔Transition elements - ✔✔Elements the can selectively absorb some wavelengths of
visible light and produce color in gems.
✔✔Treatment - ✔✔Any human-controlled process, beyond cutting and polishing, that
improves the appearance, durability, or value of a gem.
✔✔Triplet - ✔✔Single assembled stone made from three separate pieces of material
fused or cemented together, or from two pieces and a colored cement layer.
✔✔Twinning - ✔✔Change in a gem's crystal direction during or after growth.
✔✔Twinning plane - ✔✔Location of a change in crystal growth direction.
✔✔Two-phase inclusion - ✔✔A hollow cavity in a gem, usually filled with a liquid and a
gas.
✔✔Type A jadeite - ✔✔Natural jadeite enhanced only with a surface coating of wax.
✔✔Type B jadeite - ✔✔Natural jadeite that's bleached in acid to remove undesirable
staining, then impregnated with was polymers.
✔✔Type C jadeite - ✔✔Natural jadeite that's dyed and often bleached and impregnated
with wax or polymers.
✔✔Uniform strand - ✔✔A necklace featuring pearls that are very nearly the same size.
✔✔Unintended color zoning - ✔✔Visible face-up color zoning that the cutter was unable
to conceal.
, ✔✔Unit cell - ✔✔The smallest group of atoms with both the characteristics chemical
composition and crystal structure of a mineral.
✔✔Unit price - ✔✔The price per piece.
✔✔Unplanned light leakage - ✔✔Light that exits through the pavilion in a uncontrolled
way due to compromises in a gem's proportions.
✔✔Value factors - ✔✔Features used to judge the quality and value of pearls.
✔✔Vein - ✔✔A mineral deposit that occupies an exiting fissure in the rock.
✔✔Volcanic - ✔✔Pertaining to igneous activity at the earth's surface, where erupts
through a volcano or a fissure.
✔✔Watermelon tourmaline - ✔✔A tourmaline, usually elbaite with color zoning made of
a pink central zone surrounded bt a green overgrowth.
✔✔Wholesaler - ✔✔A company or individual that supplies gems to jewelry
manufactures and retailers.
✔✔Window - ✔✔An area of weak saturation in a transparent gemstone's bodycolor that
usually results from the way the gem was cut.
✔✔Xenocryst - ✔✔A "foreign crystal" that formed in unrelated rock and was brought to
the surface as a passenger in magma.
✔✔A gem produced by, or derived from, a living organism is - ✔✔organic
✔✔Which of the following is an organic gem ? - ✔✔Amber
✔✔A substance that consists of atoms of only one kind is a - ✔✔Chemical Element
✔✔A natural, inorganic substance with a characteristic chemical composition and
usually characteristic structure is a(n) - ✔✔mineral
✔✔Most gems are - ✔✔Minerals
✔✔A natural material that's made up of a mass of one or more kinds of mineral crystals
is a - ✔✔Rock
✔✔Which of the following is amorphous ? - ✔✔Amber
PAPER QUESTIONS AND ANSWERS SURE A+
✔✔Sun spangles - ✔✔Circular marks sometimes left in amber when treaters heat and
oil it.
✔✔Surface characteristics - ✔✔Blemishes or irregularities confined to a pearls surface.
✔✔Surface modification - ✔✔Altering a gem's appearance by applying backings,
coating, or coloring agents like paint.
✔✔Symmetry - ✔✔The precision and balance of the corresponding parts of a finished
gem.
✔✔Synthetic gem - ✔✔A laboratory creation with essentially the same chemical
composition, crystal structure, and properties as its natural counterpart.
✔✔Table facet - ✔✔Facet at the top of the crown, usually the largest facet on the stone.
✔✔Thermal shock - ✔✔Damage caused by sudden, extreme temperature changes.
✔✔Three-phase inclusion - ✔✔A hollow cavity in a gem, filled with a liquid, a gas, and
one or more crystals.
,✔✔Three-quarter-cut - ✔✔Cultured pearl with any unsightly portion cut or ground off.
✔✔Tone - ✔✔Degree of darkness or lightness of a color.
✔✔Tourmalinated quartz - ✔✔A type of sagenitic quartz containing needle-like or rod-
like tourmaline inclusions.
✔✔Trace elements - ✔✔Atoms in a gem that aren't part of its essential chemical
composition.
✔✔Trade terms - ✔✔Terms often used in the jewelry industry to describe particular
gemstone colors or links gems with specific geographic locations.
✔✔Transition elements - ✔✔Elements the can selectively absorb some wavelengths of
visible light and produce color in gems.
✔✔Treatment - ✔✔Any human-controlled process, beyond cutting and polishing, that
improves the appearance, durability, or value of a gem.
✔✔Triplet - ✔✔Single assembled stone made from three separate pieces of material
fused or cemented together, or from two pieces and a colored cement layer.
✔✔Twinning - ✔✔Change in a gem's crystal direction during or after growth.
✔✔Twinning plane - ✔✔Location of a change in crystal growth direction.
✔✔Two-phase inclusion - ✔✔A hollow cavity in a gem, usually filled with a liquid and a
gas.
✔✔Type A jadeite - ✔✔Natural jadeite enhanced only with a surface coating of wax.
✔✔Type B jadeite - ✔✔Natural jadeite that's bleached in acid to remove undesirable
staining, then impregnated with was polymers.
✔✔Type C jadeite - ✔✔Natural jadeite that's dyed and often bleached and impregnated
with wax or polymers.
✔✔Uniform strand - ✔✔A necklace featuring pearls that are very nearly the same size.
✔✔Unintended color zoning - ✔✔Visible face-up color zoning that the cutter was unable
to conceal.
, ✔✔Unit cell - ✔✔The smallest group of atoms with both the characteristics chemical
composition and crystal structure of a mineral.
✔✔Unit price - ✔✔The price per piece.
✔✔Unplanned light leakage - ✔✔Light that exits through the pavilion in a uncontrolled
way due to compromises in a gem's proportions.
✔✔Value factors - ✔✔Features used to judge the quality and value of pearls.
✔✔Vein - ✔✔A mineral deposit that occupies an exiting fissure in the rock.
✔✔Volcanic - ✔✔Pertaining to igneous activity at the earth's surface, where erupts
through a volcano or a fissure.
✔✔Watermelon tourmaline - ✔✔A tourmaline, usually elbaite with color zoning made of
a pink central zone surrounded bt a green overgrowth.
✔✔Wholesaler - ✔✔A company or individual that supplies gems to jewelry
manufactures and retailers.
✔✔Window - ✔✔An area of weak saturation in a transparent gemstone's bodycolor that
usually results from the way the gem was cut.
✔✔Xenocryst - ✔✔A "foreign crystal" that formed in unrelated rock and was brought to
the surface as a passenger in magma.
✔✔A gem produced by, or derived from, a living organism is - ✔✔organic
✔✔Which of the following is an organic gem ? - ✔✔Amber
✔✔A substance that consists of atoms of only one kind is a - ✔✔Chemical Element
✔✔A natural, inorganic substance with a characteristic chemical composition and
usually characteristic structure is a(n) - ✔✔mineral
✔✔Most gems are - ✔✔Minerals
✔✔A natural material that's made up of a mass of one or more kinds of mineral crystals
is a - ✔✔Rock
✔✔Which of the following is amorphous ? - ✔✔Amber
