5-Earth Science-Mineral-Kinds-Silicates-Tektosilicate-Feldspar

feldspar

Triangular silicates {feldspathoid} {feldspar}| can be low in silicon. Feldspar is the most-common silicate.

moonstone

Feldspar {moonstone}| can have pearl luster.

porphyry mineral

Fine-grained igneous rock has large feldspar crystals {porphyry}.

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Date Modified: 2022.0225