Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 in Matrix)
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 (likely banded granitic gneiss)
Quartz–feldspar–mica gneiss; commonly containing biotite and/or amphibole
metamorphic
Mica-rich metamorphic rock, likely schist
Muscovite–biotite schist, possibly phyllite; composition dominated by mica and quartz
metamorphic
Biotite Schist
Biotite-rich Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Hornblende-biotite schist (probable)
Amphibole–biotite schist; chiefly hornblende, biotite, plagioclase, and quartz
metamorphic
Garnet in Schist/Gneiss Matrix
Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
metamorphic
Kyanite blade
Kyanite, Al₂SiO₅
mineral
Fuchsite
Chromian Muscovite, K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Kyanite
Kyanite (Al2SiO5)
mineral
Rough Garnet (likely Almandine or Pyrope)
Garnet group; Almandine Fe3Al2(SiO4)3 or Pyrope Mg3Al2(SiO4)3
mineral
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
Red Garnet (Almandine-Pyrope series)
Garnet Group, Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
mineral
Muscovite Mica
Muscovite (Potassium Aluminum Silicate Hydroxide Fluoride), KAl2(AlSi3O10)(OH,F)2
mineral
Feldspathic gneiss (likely augen gneiss)
Quartz–feldspar–mica gneiss; commonly dominated by quartz, K-feldspar/plagioclase, and biotite
metamorphic
Banded gneiss (likely granitic gneiss)
Foliated gneiss composed mainly of quartz, feldspar, and dark biotite/amphibole
metamorphic
Biotite schist with quartz veins
Quartz–mica schist; primarily quartz (SiO₂), biotite mica, and feldspar
metamorphic
Almandine Garnet
Almandine (Fe3Al2Si3O12)
mineral
Banded Gneiss
Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)
metamorphic
Black Kyanite
Kyanite (Al2SiO5) with carbonaceous inclusions
mineral
Quartz Mica Schist
Mica-Quartz Schist (Chemical: SiO2 + KAl2(AlSi3O10)(OH)2)
metamorphic
Gneiss
Gneissic Metamorphic Rock
metamorphic
Mica Schist
Mica Schist (Predominantly Muscovite/Biotite)
metamorphic
Metallic sulfide-bearing metamorphic rock
Likely graphitic schist or sulfide-rich schist, with possible pyrite/arsenopyrite and mica
metamorphic
Orbicular gneiss (likely augen gneiss)
Quartz–feldspar–biotite gneiss; locally termed augen gneiss
metamorphic
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Gneiss (River Cobble)
Gneiss
metamorphic
Biotite Schist
Biotite-rich Schist (containing K(Mg,Fe)3AlSi3O10(OH,F)2)
metamorphic
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
metamorphic
Quartz on Chlorite Schist
Chlorite Schist (Mg,Fe)3(Si,Al)4O10(OH)2 with Quartz (SiO2)
metamorphic
Quartz Vein in Schist / Gneiss Metamorphic Matrix
Silicon Dioxide (SiO2) in metamorphic schist host rock
metamorphic
Granite Gneiss
Gneiss (containing quartz, alkali feldspar, plagioclase, biotite/amphibole)
metamorphic
Almandine Garnet
Iron aluminum silicate - Fe3Al2(SiO4)3
metamorphic
Kyanite in Quartz
Kyanite (Al2SiO5) with Quartz (SiO2)
metamorphic
Sapphire (Rough)
Corundum (Al2O3)
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Biotite schist
Mica schist, composed mainly of biotite mica and quartz with feldspar and iron oxides
metamorphic
Green Schist
Greenschist (composed of chlorite, epidote, and actinolite)
metamorphic
Gneiss
Metamorphic Gneiss
metamorphic
Mica Schist
Schist (Muscovite/Biotite Schist)
metamorphic
Greenschist
Greenschist (Chlorite Schist facies)
metamorphic
Quartz Vein in Schist / Gneiss
Silicon Dioxide (SiO2) in Metamorphic Matrix
igneous