metamorphic

Mica-rich schist (likely quartz-mica schist)

Quartz–mica schist, commonly containing muscovite and/or biotite with quartz and feldspar

AI-generated identification · may be incorrect

Coarse, foliated texture with shiny mica flakes and pale quartz/feldspar grains. Quartz is Mohs 7; mica is about 2–3, with perfect basal cleavage; overall color is silvery tan to brown. Exact composition and properties cannot be confirmed from the photo alone.

Identified September 27, 2026More metamorphic →

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At a glance

Common name: Mica-rich schist (likely quartz-mica schist)
Scientific name: Quartz–mica schist, commonly containing muscovite and/or biotite with quartz and feldspar
Category: metamorphic
Identified: September 27, 2026
Method: Standard

AI Estimated Value

About $1–$10 for a small, common hand specimen; higher prices require distinctive minerals, appearance, or documented locality.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Forms when clay-rich sedimentary or igneous rocks undergo regional metamorphism, producing aligned mica and schistosity. Its age depends on its source region and cannot be determined visually.

Uses & applications

Used locally as decorative facing stone, paving, and landscaping material; attractive mica-rich pieces are collected, but it is generally not a gemstone or high-value building stone.

Geological facts

The reflective flakes are likely mica, while the lighter granular material is likely quartz and feldspar. The visible alignment and coarse grains suggest schist rather than an unfoliated granite.

Field identification & locations

Look for glittering, platy mica flakes and a tendency to split along wavy foliation; common in metamorphic mountain belts worldwide. A locality label or mineral testing would be needed for a more precise identification.