Which of the following is a gem variety? Assignment 1️️demantoid
A substance that consists of atoms of only one kind is a. Assignment 1️️chemical element
Which of the following is an organic gem? Assignment 1️️amber
Many colored stones are mined by. Assignment 1️️independent mine...
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
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