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feldspar in a sentence

Example sentences for feldspar

Until now, scientists had believed the moon was made of two basic types of rock: dark basalt and light, calcium-rich feldspar.
Andesite is a gray, fine-grained volcanic rock, chiefly composed of plagioclase feldspar.
The coarse feldspar grains enclosed within the enclave are the same as the feldspar grains that make up the granite outside it.
In various proportions are feldspar and traces of other minerals.
Feldspar in the rock is moderately to intensely altered to sericite and clay minerals.

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