Gia Colored Stone final exam with comprehensive questions and
answers 2024/2025
Which of the following is a gem variety? Assignment 1✔️✔️demantoid
A substance that consists of atoms of only one kind is a. Assignment 1✔️✔️chemical element
Which of the following is an organic gem? Assignment 1✔️✔️amber
Many colored stones are mined by. Assignment 1✔️✔️independent miners using small-scale
mining methods.
Which group does almandine belong to? Assignment 1✔️✔️Garnet
Synthetic gem materials. Assignment 1✔️✔️Are not mineral
A broad gem category based on chemical composition and crystal structure is a. Assignment
1✔️✔️gem species
A natural, inorganic substance with a characteristic chemical composition and usually
characteristic crystal structure is a(n). Assignment 1✔️✔️Mineral
The world's largest gem-consuming market is. Assignment 1✔️✔️United States
Which of the following is amorphous? Assignment 1✔️✔️amber
A gem produced by, or derived from, a living organism is. Assignment 1✔️✔️organic
Most gems are. Assignment 1✔️✔️minerals
,To be a gem, a mineral must be beautiful, durable, and. Assignment 1✔️✔️rare
Media attention in the 1990s regarding its treatment reduced consumer confidence in.
Assignment 1✔️✔️emerald
A natural material that's made up of a mass of one or more kinds of mineral crystals is a.
Assignment 1✔️✔️Rock.
Myanmar's famous Mogok ruby deposits were formed by. Assignment 2✔️✔️metamorphic
processes.
Heat and pressure transform limestone into. Assignment 2✔️✔️marble
Which gem can crystallize in volcanic rock from gases released by magma? Assignment
2✔️✔️Red beryl
Which is a deposit where gems eroded from the source rock and remained in place nearby?
Assignment 2✔️✔️Eluvial
Most gemstones form in the. Assignment 2✔️✔️continental crust
From granite, pegmatite gems get exotic elements like. Assignment 2✔️✔️beryllium, boron, and
lithium.
Which is a key locality for hydrothermal gems? Assignment 2✔️✔️Ouro Preto, Brazil
Which gem forms by metamorphism? Assignment 2✔️✔️Tanzanite
,Emeralds are rarely found in placer deposits because they're. Assignment 2✔️✔️unable to
withstand much abrasion.
Most of the gems in Tanzania's Umba River Valley are found in. Assignment 2✔️✔️Placers
deposit
A deposit where gems are found in the rocks where they formed is called. Assignment
2✔️✔️primary
Which is a workable alluvial deposit of gem minerals with economic potential? Assignment
2✔️✔️placers
Which type of deposit is usually the most profitable for colored stone mining? Assignment
2✔️✔️secondary
Rocks altered by heat and pressure are. Assignment 2✔️✔️Metamorphic
Kunzite is most often found in association with. Assignment 2✔️✔️tourmaline and beryl in
pegmatite.
A two-phase inclusion is a cavity in a gem that's typically filled with. Assignments 3✔️✔️a liquid
and a gas
Which type of twinning looks as if two crystal halves are mirror images? Assignment
3✔️✔️contact
Many fashioned rubies have shallow proportions because they're cut from. Assignment
3✔️✔️flattened crystals.
Which aggregate's crystals are visible only under very high magnification? Assignment
3✔️✔️Cryptocrystalline
, Crystals that grow in a flux that is highly saturated with the necessary elements tend to be.
Assignment 3✔️✔️small
Atoms in a gem that are not part of its essential chemical composition are. Assignment 3✔️✔️trace
elements
The trace elements that cause corundum's blue are. Assignment 3✔️✔️iron and titanium.
How heavy an object is in relation to its size is called its. Assignment 3✔️✔️Density
Which element causes red in ruby and green in emerald? Assignment 3✔️✔️Chromium
Needles of actinolite found in emerald are classified as. Assignment 3✔️✔️inclusions
A unit cell defines a mineral's. Assignment 3✔️✔️basic identity.
Rough spinel often occurs as. Assignment 3✔️✔️twinned crystals
Which gems are cryptocrystalline aggregates? Assignment 3✔️✔️Chalcedony and turquoise
Which is classified in the orthorhombic crystal system? Assignment 3✔️✔️Topaz
Which type of twinning is caused by environmental change after the gem forms? Assignment
3✔️✔️polysynthetic
The pattern of dark vertical lines or bands shown by certain gems when viewed through a
spectroscope is called. Assignment 4✔️✔️absorption spectrum
answers 2024/2025
Which of the following is a gem variety? Assignment 1✔️✔️demantoid
A substance that consists of atoms of only one kind is a. Assignment 1✔️✔️chemical element
Which of the following is an organic gem? Assignment 1✔️✔️amber
Many colored stones are mined by. Assignment 1✔️✔️independent miners using small-scale
mining methods.
Which group does almandine belong to? Assignment 1✔️✔️Garnet
Synthetic gem materials. Assignment 1✔️✔️Are not mineral
A broad gem category based on chemical composition and crystal structure is a. Assignment
1✔️✔️gem species
A natural, inorganic substance with a characteristic chemical composition and usually
characteristic crystal structure is a(n). Assignment 1✔️✔️Mineral
The world's largest gem-consuming market is. Assignment 1✔️✔️United States
Which of the following is amorphous? Assignment 1✔️✔️amber
A gem produced by, or derived from, a living organism is. Assignment 1✔️✔️organic
Most gems are. Assignment 1✔️✔️minerals
,To be a gem, a mineral must be beautiful, durable, and. Assignment 1✔️✔️rare
Media attention in the 1990s regarding its treatment reduced consumer confidence in.
Assignment 1✔️✔️emerald
A natural material that's made up of a mass of one or more kinds of mineral crystals is a.
Assignment 1✔️✔️Rock.
Myanmar's famous Mogok ruby deposits were formed by. Assignment 2✔️✔️metamorphic
processes.
Heat and pressure transform limestone into. Assignment 2✔️✔️marble
Which gem can crystallize in volcanic rock from gases released by magma? Assignment
2✔️✔️Red beryl
Which is a deposit where gems eroded from the source rock and remained in place nearby?
Assignment 2✔️✔️Eluvial
Most gemstones form in the. Assignment 2✔️✔️continental crust
From granite, pegmatite gems get exotic elements like. Assignment 2✔️✔️beryllium, boron, and
lithium.
Which is a key locality for hydrothermal gems? Assignment 2✔️✔️Ouro Preto, Brazil
Which gem forms by metamorphism? Assignment 2✔️✔️Tanzanite
,Emeralds are rarely found in placer deposits because they're. Assignment 2✔️✔️unable to
withstand much abrasion.
Most of the gems in Tanzania's Umba River Valley are found in. Assignment 2✔️✔️Placers
deposit
A deposit where gems are found in the rocks where they formed is called. Assignment
2✔️✔️primary
Which is a workable alluvial deposit of gem minerals with economic potential? Assignment
2✔️✔️placers
Which type of deposit is usually the most profitable for colored stone mining? Assignment
2✔️✔️secondary
Rocks altered by heat and pressure are. Assignment 2✔️✔️Metamorphic
Kunzite is most often found in association with. Assignment 2✔️✔️tourmaline and beryl in
pegmatite.
A two-phase inclusion is a cavity in a gem that's typically filled with. Assignments 3✔️✔️a liquid
and a gas
Which type of twinning looks as if two crystal halves are mirror images? Assignment
3✔️✔️contact
Many fashioned rubies have shallow proportions because they're cut from. Assignment
3✔️✔️flattened crystals.
Which aggregate's crystals are visible only under very high magnification? Assignment
3✔️✔️Cryptocrystalline
, Crystals that grow in a flux that is highly saturated with the necessary elements tend to be.
Assignment 3✔️✔️small
Atoms in a gem that are not part of its essential chemical composition are. Assignment 3✔️✔️trace
elements
The trace elements that cause corundum's blue are. Assignment 3✔️✔️iron and titanium.
How heavy an object is in relation to its size is called its. Assignment 3✔️✔️Density
Which element causes red in ruby and green in emerald? Assignment 3✔️✔️Chromium
Needles of actinolite found in emerald are classified as. Assignment 3✔️✔️inclusions
A unit cell defines a mineral's. Assignment 3✔️✔️basic identity.
Rough spinel often occurs as. Assignment 3✔️✔️twinned crystals
Which gems are cryptocrystalline aggregates? Assignment 3✔️✔️Chalcedony and turquoise
Which is classified in the orthorhombic crystal system? Assignment 3✔️✔️Topaz
Which type of twinning is caused by environmental change after the gem forms? Assignment
3✔️✔️polysynthetic
The pattern of dark vertical lines or bands shown by certain gems when viewed through a
spectroscope is called. Assignment 4✔️✔️absorption spectrum
