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Final Exam -GIA Colored Stone|109 Test Questions and Answers 100% Correct
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Final Exam -GIA Colored Stone|109 Test Questions and Answers 100% Correct
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Final Exam -GIA Colored Stone|109 Test Questions andAnswers 100% Correct
tree resin hardened over time up to 1000 years Correct-amber
inmature amber Correct-copal
most valuable amber Correct-transparent red
cause amber color change over time Correct-oxidation
circular marks sometimes left in amber when heat and oil it Correct-sun spangles
coral most valuable color Correct-intense red
color of conchiolin coral Correct-black and gold
most valuable ivory Correct-elephant tusks
, Final Exam -GIA Colored Stone|109 Test Questions and
Answers 100% Correct
ornamental form of lignite coal Correct-jet
major jet source Correct-England
A natural, inorganic substance with a characteristic chemical composition and usually
characteristic crystal structure is a(n) Correct-mineral
Which of the following is a gem variety Correct-demantoid
A substance that consists of atoms of only one kind is a Correct-Chemicals element
A broad gem category based on chemical composition and crystal structure is a Correct-
gem species.
Kunzite is most often found in association with Correct-tourmaline and beryl in pegmatite.
Myanmar's famous Mogok ruby deposits were formed by Correct-metamorphic processes.
, Final Exam -GIA Colored Stone|109 Test Questions and
Answers 100% Correct
Most of the gems in Tanzania's Umba River Valley are found in Correct-placer deposits
From granite, pegmatite gems get exotic elements like Correct-beryllium, boron, and
lithium.
Heat and pressure transform limestone into Correct-marble
Which type of twinning looks as if two crystal halves are mirror images Correct-Contact
Which type of twinning is caused by environmental change after the gem forms Correct-
Polysynthetic
A unit cell defines a mineral's Correct-basic identity.
Which is classified in the orthorhombic crystal system Correct-
topaz,iolite,tanzanite,chrysoberyl and peridot
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