Mica Schist
Metamorphic rock predominantly composed of muscovite or biotite with quartz and feldspar
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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Garnet in Schist/Gneiss Matrix
Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
metamorphic
Fuchsite
Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
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
Garnet in Matrix
Almandine Garnet (Fe3Al2(SiO4)3)
metamorphic
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
metamorphic
Schist
Schist (variety likely Mica Schist)
metamorphic
Gneiss (Hornblende/Biotite Gneiss)
Foliated Metamorphic Rock (Quartz-Feldspar-Amphibole/Mica matrix)
metamorphic
Quartz Vein in Schist / Gneiss Metamorphic Matrix
Silicon Dioxide (SiO2) in metamorphic schist host rock
metamorphic
Iolite (Cordierite)
Cordierite (Mg2Al4Si5O18)
gemstone
Garnet
Garnet Group (formula varies, e.g., Almasndine: Fe3Al2(SiO4)3)
mineral
Garnet
Garnet Group (Silicate Minerals), formula varies e.g., Almandine Fe3Al2(SiO4)3
mineral
Gneiss (Cobble)
Gneiss
metamorphic
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2
metamorphic
Gneiss
Gneiss (quartz-feldspar-biotite gneiss)
metamorphic
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
metamorphic
Quartz Vein in Schist / Gneiss
Silicon Dioxide (SiO2) in Metamorphic Matrix
igneous
Quartz Vein in Metamorphic Rock
Quartz-veined Schist or Gneiss
metamorphic
Aquamarine
Beryl (Be3Al2(SiO3)6)
gemstone
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH,F)4)
mineral
Corundum (Sapphire / Raw Sapphire)
Aluminum Oxide (Al2O3)
gemstone
Tumbled Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)
mineral
Garnet
Almandine Garnet (Fe3Al2(SiO4)3)
mineral
Gneiss (specifically Granitic Gneiss)
Gneissic Metamorphic Rock
metamorphic
Greenschist
Greenschist (Chlorite Schist facies)
metamorphic
Schist
Crystalline Metamorphic Rock (Schist)
metamorphic
Banded gneiss
Gneiss, chiefly quartz–feldspar–mica (variable composition)
metamorphic
Gneiss (specifically Pink Gneiss)
Gneiss (high-grade regional metamorphic rock)
metamorphic
Schist
Schist (various mineralogical compositions including mica, chlorite, talc, etc.)
Metamorphic
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Ruby / Pink Sapphire
Corundum (Al2O3 with Chromium impurities)
gemstone
Rough Sapphire
Corundum (Al2O3)
mineral
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Greenschist
Chlorite Schist
metamorphic
Kyanite
Kyanite (Al2SiO5)
mineral
Quartzite
Quartzite; predominantly microcrystalline quartz (SiO₂)
metamorphic
Greenschist
Chlorite schist
metamorphic
Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)
mineral
Fairy Stone (Staurolite)
Staurolite (Fe2+2Al9Si4O22(OH)2)
mineral