metamorphic

Likely mica-rich schist

Mica schist, probably muscovite–biotite schist with quartz and feldspar

AI-generated identification · may be incorrect

Silvery to bronze, strongly reflective platy flakes suggest mica; quartz/feldspar make the lighter, granular patches. Mica is Mohs 2–3 with perfect basal cleavage; quartz is 7. The rounded shape and surface wear obscure foliation, so identification from the photo is provisional.

Identified October 5, 2026More metamorphic →

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Physical properties

Formation & geological history

Formed when clay-rich sediment or igneous rock was metamorphosed under heat and pressure, aligning mica into foliated layers. Such rocks commonly formed during Precambrian mountain-building; the exact age cannot be determined visually.

Uses & applications

Mica schist is mainly collected or used as decorative stone and sometimes as local building or landscaping material; mica itself has electrical and industrial uses.

Geological facts

The shiny surfaces are likely reflections from mica flakes, not metallic ore. The specimen appears rounded or weathered, which can hide its original layered texture.

Field identification & locations

Check for thin, flexible mica flakes and a tendency to split along foliation; a fresh broken surface would help confirm it. Mica-bearing metamorphic rocks are plausible in Zambia’s regional Precambrian basement, though the specific find location is uncertain.