1 | Page
GIA Colored Stone Final Exam Questions
and Answers
By what date had Kokichi Mikimoto begun culturing whole pearls
Ans: 1908
Synthetic gem materials Ans: Are not minerals
which of the following is an organic gem Ans: amber
which of the following is amorphous Ans: amber
a natural material that's made up of a mass of one or more kinds
of mineral crystals is Ans: rock
what group does alamandine belong to Ans: garnet
A gem produced by, or derived from, a living organism is Ans:
organic
© 2025 All rights reserved
, 2 | Page
which of the following is a gem variety Ans: demantoid
the world's largest gem-consuming market is Ans: the US
a substance that consists of atoms of only one kind is a Ans:
chemical element
Media attention in the 1990s regarding its treatment reduced
consumer confidence in Ans: emerald
a natural, inorganic substance with a characteristic chemical
composition and usual crystal structure is a Ans: mineral
most gems are Ans: minerals
To be a gem, a mineral must be beautiful, durable, and Ans: rare
a broad gem category based on chemical composition and crystal
structure is called a Ans: gem species
© 2025 All rights reserved
, 3 | Page
Many colored stones are mined by Ans: independent miners using
small-scale mining methods.
Rocks altered by heat and pressure beneath Earth's surface are
Ans: metamorphic
Which type of deposit is usually the most profitable for colored
stone mining? Ans: secondary
Which gem can crystallize in volcanic rock from gasses released by
magma? Ans: red beryl
Emeralds are rarely found in placer deposits because they're Ans:
unable to withstand much abrasion
Which is a workable alluvial deposit of gem minerals with
economic potential? Ans: placers
Which is a deposit where gems eroded from the source rock and
remained in place nearby? Ans: eluvial
© 2025 All rights reserved
, 4 | Page
from granite, pegmatite gems get exotic elements like Ans:
beryllium, boron, and lithium
Myanmar's famous Mogok ruby deposits were formed by Ans:
metamorphic process
most of the gems in tanzania's umba river valley are formed in
Ans: placer deposits
A deposit where gems are found in the rock that where they
formed is called Ans: primary deposit
Which is a key locality for hydrothermal gems? Ans: Ouro Preto,
Brazil
Heat and pressure transform limestone into Ans: marble
which gem form by metamophosis Ans: tanzanite
Most gemstones form in the Ans: continental crust
© 2025 All rights reserved
GIA Colored Stone Final Exam Questions
and Answers
By what date had Kokichi Mikimoto begun culturing whole pearls
Ans: 1908
Synthetic gem materials Ans: Are not minerals
which of the following is an organic gem Ans: amber
which of the following is amorphous Ans: amber
a natural material that's made up of a mass of one or more kinds
of mineral crystals is Ans: rock
what group does alamandine belong to Ans: garnet
A gem produced by, or derived from, a living organism is Ans:
organic
© 2025 All rights reserved
, 2 | Page
which of the following is a gem variety Ans: demantoid
the world's largest gem-consuming market is Ans: the US
a substance that consists of atoms of only one kind is a Ans:
chemical element
Media attention in the 1990s regarding its treatment reduced
consumer confidence in Ans: emerald
a natural, inorganic substance with a characteristic chemical
composition and usual crystal structure is a Ans: mineral
most gems are Ans: minerals
To be a gem, a mineral must be beautiful, durable, and Ans: rare
a broad gem category based on chemical composition and crystal
structure is called a Ans: gem species
© 2025 All rights reserved
, 3 | Page
Many colored stones are mined by Ans: independent miners using
small-scale mining methods.
Rocks altered by heat and pressure beneath Earth's surface are
Ans: metamorphic
Which type of deposit is usually the most profitable for colored
stone mining? Ans: secondary
Which gem can crystallize in volcanic rock from gasses released by
magma? Ans: red beryl
Emeralds are rarely found in placer deposits because they're Ans:
unable to withstand much abrasion
Which is a workable alluvial deposit of gem minerals with
economic potential? Ans: placers
Which is a deposit where gems eroded from the source rock and
remained in place nearby? Ans: eluvial
© 2025 All rights reserved
, 4 | Page
from granite, pegmatite gems get exotic elements like Ans:
beryllium, boron, and lithium
Myanmar's famous Mogok ruby deposits were formed by Ans:
metamorphic process
most of the gems in tanzania's umba river valley are formed in
Ans: placer deposits
A deposit where gems are found in the rock that where they
formed is called Ans: primary deposit
Which is a key locality for hydrothermal gems? Ans: Ouro Preto,
Brazil
Heat and pressure transform limestone into Ans: marble
which gem form by metamophosis Ans: tanzanite
Most gemstones form in the Ans: continental crust
© 2025 All rights reserved
