Mica Schist
Mica Schist (predominantly Muscovite or Biotite)
metamorphic
Category
Metamorphic (Likely Gneiss Or Schist Based On Texture)
Browse metamorphic (likely gneiss or schist based on texture) specimens identified by the Rock Identifier community.
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Gneiss (with Quartz and Mica)
Gneiss
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Fuchsite
Cr-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Gneiss
Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Garnet (specifically Almandine)
Almandine - Fe3Al2(SiO4)3
metamorphic
Weathered quartz-rich metamorphic rock (likely gneiss or quartzite)
Quartz (SiO₂) with probable feldspar, mica, and iron-oxide alteration
metamorphic
Schist
Mica Schist
metamorphic
Schist
Schist; commonly mica schist, composed chiefly of muscovite/biotite mica with quartz and feldspar
metamorphic
Banded gneiss pebble
Gneiss, composed chiefly of quartz, feldspar, and mica/amphibole
metamorphic
Banded gneiss cobble
Gneiss, commonly quartz–feldspar–biotite gneiss
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Quartz Vein in Gneiss or Schist
Silicon dioxide (SiO2) within metamorphic host rock
metamorphic
Likely weathered metamorphic rock (possibly schist or gneiss)
Indeterminate; probable mica-rich quartz–feldspar metamorphic rock
metamorphic
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Ruby / Pink Sapphire
Corundum (Al2O3 with Chromium impurities)
gemstone
Weathered schist or phyllite
Mica schist/phyllite, likely quartz–mica-rich metamorphic rock
metamorphic
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Schist, likely biotite–muscovite schist
Mica schist; predominantly quartz, feldspar, muscovite and biotite
metamorphic
Garnet in Matrix
Almandine Garnet (Fe3Al2(SiO4)3)
metamorphic
Mica Schist
Mica Schist
metamorphic
Quartz-veined metamorphic rock, likely mica schist
Mica schist with a milky-quartz vein; predominantly quartz, feldspar, and biotite/muscovite mica
metamorphic
Banded gneiss pebble
Gneiss, likely quartz–feldspar–mica gneiss
metamorphic
Gneiss
High-grade regional metamorphic rock
metamorphic
Gneiss
Gneissic Metamorphic Rock (Mineral composition: Quartz, Feldspar, Amphibole/Biotite)
metamorphic
Blue Sapphire (Faceted)
Corundum (Al2O3)
gemstone
Rough Sapphire (Corundum)
Corundum (Al2O3)
mineral
Blue-gray kyanite crystal
Kyanite, Al₂SiO₅
mineral
Banded gneiss pebble
Gneiss, chiefly quartz–feldspar–mica; exact variety indeterminate from image
metamorphic
Quartz Vein in Metamorphic Rock
Quartz-veined Schist or Gneiss
metamorphic
Aquamarine
Beryl (Be3Al2(SiO3)6)
gemstone
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
metamorphic
Dark mica-rich metamorphic rock, likely schist
Mica schist; commonly quartz–biotite ± muscovite schist
metamorphic
Garnet
Garnet group (X3Y2(SiO4)3)
mineral
Mica Schist with Iron Staining
Mica Schist
metamorphic
Sapphire
Corundum (Al2O3)
mineral
Iolite (Cordierite)
Cordierite (Mg2Al4Si5O18)
gemstone
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
metamorphic
Greenschist
Greenschist (Chlorite Schist)
metamorphic
Granite Gneiss with Garnet
Garnetiferous Gneiss
metamorphic
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Weathered iron-rich rock fragment
Likely limonite/goethite-bearing rock, possibly altered pyrite or mica schist
mineral