GIA Colored Stones Assignment with comprehensive questions and
answers 2024/2025
commercially important gems✔️✔️Treatments that improve gem appearance and quality increase
the supply of...
available, affordable✔️✔️Treatments that make gems more _____________ and ____________
are an important part of today's gem and jewelry market.
disclosed✔️✔️All treatments, even suspected or probable treatments, should be ______________
as part of every transaction.
gems that are commonly heat treated✔️✔️Corundum, tanzanite, zircon, topaz, aquamarine, and
amber.
heat treatment✔️✔️What can alter color and create or eliminate phenomena and inclusions?
lattice diffusion with titanium✔️✔️What produces a shallow layer of color that can be removed
with minor repolishing?
beryllium, penetrate✔️✔️The color resulting from lattice diffusion with _______________, might
______________ the entire stone.
emeralds✔️✔️Almost all ______________ on the market today are fracture filled.
irradiated, heat, light✔️✔️____________ color is not always stable and exposure to _________ or
__________ can destroy it.
topaz, tourmaline, cultured pearl✔️✔️Commonly irradiated gems include,
, bleaching✔️✔️What is a fairly common pearl treatment?
jadeite✔️✔️What is often treated with a combination of bleaching and impregnation?
dyeing✔️✔️What is one of the oldest gem treatments?
commonly dyed gems✔️✔️Cultured pearl, lapis lazuli, chalcedony, and coral are examples of...
bleaching✔️✔️A treatment that uses chemicals to lighten or remove color.
colorless impregnation✔️✔️Filling of pores or other openings with melted wax, resin, polymer, or
plastic to improve appearance and stability.
dyeing✔️✔️A treatment that adds color or affects color by deepening it, making it more even, or
changing it.
fracture (fissure) filling✔️✔️Using a filler to conceal fractures and improve the apparent clarity of
a gem.
hardener✔️✔️A chemical that treaters mix with some resins to cause them to solidify.
heat treatment✔️✔️Exposing a gem to rising temperatures for the purpose of changing its
appearance.
irradiation✔️✔️Exposing a gem to radiation to change or improve its color.
lattice diffusion✔️✔️A treatment in which a gem is exposed to high temperatures and chemicals to
allow penetration of color-causing elements.
answers 2024/2025
commercially important gems✔️✔️Treatments that improve gem appearance and quality increase
the supply of...
available, affordable✔️✔️Treatments that make gems more _____________ and ____________
are an important part of today's gem and jewelry market.
disclosed✔️✔️All treatments, even suspected or probable treatments, should be ______________
as part of every transaction.
gems that are commonly heat treated✔️✔️Corundum, tanzanite, zircon, topaz, aquamarine, and
amber.
heat treatment✔️✔️What can alter color and create or eliminate phenomena and inclusions?
lattice diffusion with titanium✔️✔️What produces a shallow layer of color that can be removed
with minor repolishing?
beryllium, penetrate✔️✔️The color resulting from lattice diffusion with _______________, might
______________ the entire stone.
emeralds✔️✔️Almost all ______________ on the market today are fracture filled.
irradiated, heat, light✔️✔️____________ color is not always stable and exposure to _________ or
__________ can destroy it.
topaz, tourmaline, cultured pearl✔️✔️Commonly irradiated gems include,
, bleaching✔️✔️What is a fairly common pearl treatment?
jadeite✔️✔️What is often treated with a combination of bleaching and impregnation?
dyeing✔️✔️What is one of the oldest gem treatments?
commonly dyed gems✔️✔️Cultured pearl, lapis lazuli, chalcedony, and coral are examples of...
bleaching✔️✔️A treatment that uses chemicals to lighten or remove color.
colorless impregnation✔️✔️Filling of pores or other openings with melted wax, resin, polymer, or
plastic to improve appearance and stability.
dyeing✔️✔️A treatment that adds color or affects color by deepening it, making it more even, or
changing it.
fracture (fissure) filling✔️✔️Using a filler to conceal fractures and improve the apparent clarity of
a gem.
hardener✔️✔️A chemical that treaters mix with some resins to cause them to solidify.
heat treatment✔️✔️Exposing a gem to rising temperatures for the purpose of changing its
appearance.
irradiation✔️✔️Exposing a gem to radiation to change or improve its color.
lattice diffusion✔️✔️A treatment in which a gem is exposed to high temperatures and chemicals to
allow penetration of color-causing elements.
