metamorphic

Fuchsite-bearing green mica schist

Mica schist, chiefly muscovite/fuchsite mica with quartz; approximate mica composition KAl₂(AlSi₃O₁₀)(OH)₂

AI-generated identification · may be incorrect

Typically gray-green to emerald-green, with a silky to pearly luster and strongly foliated, flaky texture; mica hardness is about 2–3, while quartz-rich portions reach 7. Cleavage is excellent along mica layers, and the specimen appears platy and flexible at thin edges.

Identified September 20, 2026More metamorphic →

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At a glance

Common name: Fuchsite-bearing green mica schist
Scientific name: Mica schist, chiefly muscovite/fuchsite mica with quartz; approximate mica composition KAl₂(AlSi₃O₁₀)(OH)₂
Category: metamorphic
Identified: September 20, 2026
Method: Standard

AI Estimated Value

About $5–$25 for a common palm-sized specimen; $30–$100+ if vividly green, well polished, or unusually attractive.

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 clay-rich sedimentary or volcanic protoliths were regionally metamorphosed under elevated pressure and temperature, producing aligned mica; most examples are Paleozoic to Precambrian in age. The green color commonly reflects chromium-bearing fuchsite or chlorite.

Uses & applications

Primarily a decorative and collector specimen; polished pieces are used for display, cabochons, and ornamental stone, but its pronounced foliation limits construction use.

Geological facts

The shimmering surface is caused by reflected light from parallel mica sheets, a feature called schistosity. It may be confused with green slate, chlorite schist, or serpentine.

Field identification & locations

Identify it by visible parallel flakes, easy splitting, pearly sheen, and glittering green layers; acid testing is unnecessary. Common in metamorphic belts worldwide, including India, Brazil, Russia, and the Alps.