Gia Colored Stone Final Exam Questions and Answers (Graded A+)
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Course
Gia Colored Stone
Institution
Gia Colored Stone
Which of the following is a gem variety? Assignment 1 - ANSWER - demantoid
A substance that consists of atoms of only one kind is a. Assignment 1 - ANSWER - chemical element
Which of the following is an organic gem? Assignment 1 - ANSWER - amber
Many colored stones are mined by. Assignment...
Gia Colored Stone Final Exam
Questions and Answers
(Graded A+)
Which of the following is a gem variety? Assignment 1 - ANSWER - demantoid
A substance that consists of atoms of only one kind is a. Assignment 1 - ANSWER -
chemical element
Which of the following is an organic gem? Assignment 1 - ANSWER - amber
Many colored stones are mined by. Assignment 1 - ANSWER - independent miners
using small-scale mining methods.
Which group does almandine belong to? Assignment 1 - ANSWER - Garnet
Synthetic gem materials. Assignment 1 - ANSWER - Are not mineral
A broad gem category based on chemical composition and crystal structure is a.
Assignment 1 - ANSWER - gem species
A natural, inorganic substance with a characteristic chemical composition and
usually characteristic crystal structure is a(n). Assignment 1 - ANSWER - Mineral
Kunzite is most often found in association with. Assignment 2 - ANSWER -
tourmaline and beryl in pegmatite.
A two-phase inclusion is a cavity in a gem that's typically filled with. Assignments 3
- ANSWER - a liquid and a gas
,Which type of twinning looks as if two crystal halves are mirror images? Assignment
3 - ANSWER - contact
Most gemstones form in the. Assignment 2 - ANSWER - continental crust
From granite, pegmatite gems get exotic elements like. Assignment 2 - ANSWER -
beryllium, boron, and lithium.
Which is a key locality for hydrothermal gems? Assignment 2 - ANSWER - Ouro
Preto, Brazil
Which gem forms by metamorphism? Assignment 2 - ANSWER - Tanzanite
Emeralds are rarely found in placer deposits because they're. Assignment 2 -
ANSWER - unable to withstand much abrasion.
Most of the gems in Tanzania's Umba River Valley are found in. Assignment 2 -
ANSWER - Placers deposit
A deposit where gems are found in the rocks where they formed is called.
Assignment 2 - ANSWER - primary
Which is a workable alluvial deposit of gem minerals with economic potential?
Assignment 2 - ANSWER - placers
Which type of deposit is usually the most profitable for colored stone mining?
Assignment 2 - ANSWER - secondary
Rocks altered by heat and pressure are. Assignment 2 - ANSWER - Metamorphic
Many fashioned rubies have shallow proportions because they're cut from.
Assignment 3 - ANSWER - flattened crystals.
,Which aggregate's crystals are visible only under very high magnification?
Assignment 3 - ANSWER – Cryptocrystalline
The world's largest gem-consuming market is. Assignment 1 - ANSWER - United
States
Which of the following is amorphous? Assignment 1 - ANSWER - amber
A gem produced by, or derived from, a living organism is. Assignment 1 - ANSWER -
organic
Most gems are. Assignment 1 - ANSWER - minerals
To be a gem, a mineral must be beautiful, durable, and. Assignment 1 - ANSWER -
rare
Media attention in the 1990s regarding its treatment reduced consumer confidence
in. Assignment 1 - ANSWER - emerald
A natural material that's made up of a mass of one or more kinds of mineral crystals
is a. Assignment 1 - ANSWER - Rock.
Myanmar's famous Mogok ruby deposits were formed by. Assignment 2 - ANSWER -
metamorphic processes.
Which gem can crystallize in volcanic rock from gases released by magma?
Assignment 2 - ANSWER - Red beryl
Which is a deposit where gems eroded from the source rock and remained in place
nearby? Assignment 2 - ANSWER - Eluvial
, Crystals that grow in a flux that is highly saturated with the necessary elements
tend to be. Assignment 3 - ANSWER - small
The process where electrons that selectively absorb light are passed back and forth
between neighboring impurity ions is known as. Assignment 4 - ANSWER - charge
transfer
Needles of actinolite found in emerald are classified as. Assignment 3 - ANSWER -
inclusions
A unit cell defines a mineral's. Assignment 3 - ANSWER - basic identity.
Which gems are cryptocrystalline aggregates? Assignment 3 - ANSWER -
Chalcedony and turquoise
Which is classified in the orthorhombic crystal system? Assignment 3 - ANSWER -
Topaz
Which type of twinning is caused by environmental change after the gem forms?
Assignment 3 - ANSWER - polysynthetic
The pattern of dark vertical lines or bands shown by certain gems when viewed
through a spectroscope is called. Assignment 4 - ANSWER - absorption spectrum
What is the only type of gem that can show pleochroism? Assignment 4 - ANSWER -
Doubly refractive
Which gem can show three pleochroic colors? Assignment 4 - ANSWER - Iolite
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