metamorphic

Mica-rich schist (likely quartz–muscovite schist)

Quartz–muscovite schist; commonly composed of quartz (SiO₂), muscovite mica, and possibly feldspar

AI-generated identification · may be incorrect

Hardness is typically 2–7 depending on the mineral tested; silvery-gray, strongly sparkly, with a foliated texture and platy mica cleavage. Quartz and feldspar are glassy to pearly; specific gravity is approximately 2.6–2.8.

Identified September 4, 2026More metamorphic →

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At a glance

Common name: Mica-rich schist (likely quartz–muscovite schist)
Scientific name: Quartz–muscovite schist; commonly composed of quartz (SiO₂), muscovite mica, and possibly feldspar
Category: metamorphic
Identified: September 4, 2026
Method: Standard

AI Estimated Value

$1–$10 for a common hand specimen; approximately $10–$30 for unusually large, attractive, or locality-labeled pieces.

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

Formed when shale or another clay-rich sediment was subjected to regional metamorphism, producing aligned mica layers; commonly Paleozoic to Precambrian, though age depends on locality.

Uses & applications

Used locally as decorative stone, landscaping material, and occasionally building veneer; attractive pieces are collected, but it is rarely a gemstone.

Geological facts

The glitter comes from reflective mica flakes, while the pale granular material is mostly quartz and feldspar. Its foliation allows splitting along metamorphic planes.

Field identification & locations

Identify it by visible planar layering, abundant shiny mica, and light-colored granular quartz; distinguish it from granite by its pronounced alignment and schistosity. Common in metamorphic mountain belts worldwide.