mineral

White sheet mica (likely muscovite)

Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂

AI-generated identification · may be incorrect

Pale, translucent-to-white, pearly luster; Mohs hardness 2–2.5. Mica has a layered monoclinic crystal structure and perfect basal cleavage, splitting into thin flexible sheets; the pictured piece appears to be a thin sheet specimen.

Identified September 23, 2026More mineral →

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Physical properties

Formation & geological history

Forms in granites, pegmatites, and metamorphic rocks such as schist, typically during slow cooling or metamorphism. It is common in Precambrian and younger rocks; the specimen’s age cannot be determined from the image.

Uses & applications

Used as an electrical and thermal insulator, filler in paints and cosmetics, and occasionally in crafts or mineral collections.

Geological facts

Muscovite’s name refers to its historic use as window material in Russia. Its exceptionally perfect cleavage lets it peel into remarkably thin sheets.

Field identification & locations

Identify it by its flexible, transparent-to-translucent sheets and easy splitting along flat planes; common sources include India, Brazil, Russia, and the United States. The image alone cannot confirm the mineral, but white sheet mica is the closest match.