metamorphic

Mica-rich schist

Muscovite–biotite schist, with quartz and feldspar

AI-generated identification · may be incorrect

Typically Mohs 2–3 for mica and 6–7 for quartz; silvery-gold to dark, with a shiny, foliated texture and platy mica crystals. The pictured pieces’ exact mineral makeup cannot be confirmed visually.

Identified October 5, 2026More metamorphic →

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Physical properties

Formation & geological history

Forms when clay-rich or other sedimentary rocks undergo heat and pressure, aligning mica into layers; metamorphism may date from a wide range of geological periods.

Uses & applications

Mostly used as a decorative or collector stone; some mica-bearing rock is used as landscaping stone or aggregate, though it is generally unsuitable for structural construction.

Geological facts

Its reflective sheen comes from mica flakes, and its layered fabric can split along foliation.

Field identification & locations

Look for visible, aligned mica flakes and a glittering surface; common in metamorphic mountain belts worldwide. The image is consistent with mica-rich schist, but identification from appearance alone is uncertain.