Mica is a mineral group of layered silicate minerals characterized by sheet-like crystals that split into thin, flexible flakes. It occurs in igneous, metamorphic, and sedimentary rocks and is valued for its sheen and insulation properties. In everyday use, “mica” often refers to the mineral itself or products containing mica powder for cosmetics and industry. It is typically found in granitic rocks and is known for its pearly luster.
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