题目内容

How many percentages do the nonsilicates make up approximately of Earth’s crust

A. 2
B. 8
C. 33
D. 76

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The biotite belongs to:

A. Light silicate
B. Dark silicate

The feldspars group belong to:

A. Light silicate
B. Dark silicate

Ways of how minerals formed.

A. Precipitation of Mineral Matter
B. Crystallization of Molten Rock
C. Deposition as a Result of Biological Process

The most common mechanical properties we used to identify the minerals are:

A. color
B. cleavage
C. transparency
D. hardness
E. fracture
F. luster

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