Gemstones are commonly found in pegmatites

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Reference no: EM13307602

1. Gemstones are commonly found in pegmatites, which are igneous rocks that are ____________.

a. exceptionally mafic

b. extrusive, forming from lava

c. exceptionally coarse grained

d. exceptionally fine grained

2. Cleavage in minerals refers to ____________.

a. a tendency to break in an irregular pattern

b. a tendency to break along planes of weakness

c. the sharpness of edges between crystal faces

d. the development of distinct crystal faces.

Reference no: EM13307602

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