Group: Nonferromagnesian("light")Silicate

Mineral: Muscovite mica

Chemical Composition: KAI2(AlSi3O10)(OH)2

Common Characteristics: Colorless or brown; splits into thin, translucent sheets

Mineral: Potassium feldspar(orthoclase)

Chemical Composition: KAISi3O8

Common Characteristics: Black or brown; often appear as hexagonal crystals in thin sheets

Mineral: Plagioclase feldspar

Chemical Composition: (Ca,Na)AlSi3O8

Common Characteristics: White to gray color, striations often appear along cleavage planes

Mineral: Quartz

Chemical Composition: SiO2

Common Characteristics: Commonly colorless, forms six-sided elongated crystals.

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