metamorphic
Mica-rich rock, likely mica schist
Mica schist, composed chiefly of muscovite and/or biotite with quartz and feldspar
AI-generated identification · may be incorrectCoarse, flaky, silvery reflective mica in a gray-brown matrix; mica has perfect basal cleavage and Mohs hardness 2–3, while quartz is 7. The hand-sized specimen’s texture suggests schist, though an image alone cannot confirm its exact composition.
Identified More metamorphic →
Explore Mica-rich rock, likely mica schist in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Coarse, flaky, silvery reflective mica in a gray-brown matrix; mica has perfect basal cleavage and Mohs hardness 2–3, while quartz is 7. The hand-sized specimen’s texture suggests schist, though an image alone cannot confirm its exact composition.
Formation & geological history
Forms when clay-rich sedimentary or igneous rocks undergo heat and pressure, aligning mica into a foliated texture; schists span many geological ages and occur in regional metamorphic belts.
Uses & applications
Mica is used in electrical and thermal insulation and cosmetics; mica schist is mainly a teaching or collector specimen and is generally unsuitable for durable building stone.
Geological facts
Mica’s thin sheets reflect light and can split into flexible flakes; the visible sheen is characteristic of abundant mica.
Field identification & locations
Look for glittering platy flakes and a layered or foliated fabric; common in metamorphic mountain belts worldwide. A hardness or mineral test would help distinguish schist from mica-rich pegmatite or weathered rock.
More like this
Other metamorphic specimens
Nephrite Jade
Nephrite
Mineral/Rock
Amphibolite
Amphibolite
metamorphic
Rhodonite
Manganese Silicate (Mn, Fe, Mg, Ca)SiO3
mineral
Rhodonite
(Mn,Fe,Mg,Ca)SiO3
mineral
Greenschist
Greenschist (containing Chlorite, Actinolite, and Epidote)
metamorphic
Garnet
Garnet group: X3Y2(SiO4)3 (commonly Almandine-Pyrope series)
mineral