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Mica Schist identification and geology

Strongly foliated metamorphic rock rich in mica minerals muscovite and/or biotite with visible crystal grains. Texture: Schistose strongly foliated. Rock type: Metamorphic Foliated. Grain size: Medium to coarse. Parent rock: Shale/Mudstone. Minerals present: Muscovite, Biotite, Quartz, Garnet, Staurolite. Formation: Forms from medium-grade regional metamorphism of pelitic rocks shale, mudstone . Micas grow perpendicular to stress. Common geological settings: Found in orogenic belts worldwide; Himalayas, Alps, Appalachians. Common look-alikes and related entries: Phyllite, Gneiss, Slate.

Sources, scope & corrections

These authoritative resources support category-level nomenclature, terminology, identification methods, and safety. When a specimen-specific safety warning appears, the public-health source listed here directly supports that precaution. They are not line-by-line citations for every other property on this entry, and natural specimens vary.

Editorial owner
GeoMiner
Last updated
2026-02-10T20:35:32.277952+00:00
Review status
Published; not independently peer-reviewed
  • Rocks — U.S. National Park Service. Authoritative overview of rock groups, the rock cycle, and geologic processes.
  • Can you identify my rock or mineral? — U.S. Geological Survey. Identification limitations and routes to in-person professional verification.

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Common questions

What is Mica Schist?
Strongly foliated metamorphic rock rich in mica minerals muscovite and/or biotite with visible crystal grains.
How can you identify Mica Schist?
Compare several properties rather than relying on colour alone. This entry records rock type: Metamorphic Foliated; texture: Schistose strongly foliated; grain size: Medium to coarse; common minerals: Muscovite, Biotite, Quartz, Garnet, Staurolite. Confirm an important identification with additional field tests or qualified laboratory work.
How does Mica Schist form?
Forms from medium-grade regional metamorphism of pelitic rocks shale, mudstone . Micas grow perpendicular to stress.
Where is Mica Schist commonly found?
Found in orogenic belts worldwide; Himalayas, Alps, Appalachians.
What is Mica Schist commonly confused with?
Mica Schist may be confused with Phyllite, Gneiss, Slate. Compare multiple diagnostic properties because colour and surface appearance can overlap.

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