What is not required for the production of diamonds?
A) carbon
B) extreme temperatures and pressures
C) subduction or collision
D) graphite
Correct Answer:
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Q22: With regard to minerals,hardness refers to _.
A)the
Q27: Minerals can be destroyed by _ .
A)melting
B)chemical
Q33: Trace amounts of impurity in a mineral
Q34: The most recently formed portion of any
Q36: Which of the following minerals is softest?
A)quartz
B)calcite
C)talc
D)fluorite
Q42: Minerals are classified into groups known as
Q42: Which common gemstone results from biomineralization?
A)diamonds
B)garnets
C)pearls
D)sapphires
Q44: The diamonds we see today do not
Q46: Ore minerals,such as galena,tend to be distinct
Q49: Which two gems are special versions of
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