Schist
Mica Schist
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.
Banded River Rock / Gneiss (highly weathered)
Gneiss
Metamorphic rock
Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Biotite / Black Mica
K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
mineral
Granite Gneiss
Gneiss (high-grade metamorphic rock)
metamorphic
Garnet (likely Almandine or Pyrope)
Garnet Group, Nesosilicates (Complex chemistry, e.g., Almandine: Fe3Al2Si3O12)
mineral
Quartzite Cobble
Metamorphosed Quartz Sandstone (primarily SiO2)
metamorphic
Schist
Mica Schist (primarily composed of quartz, feldspar, and mica)
metamorphic
Garnet (likely Almandine)
Almandine - Fe3Al2(SiO4)3
mineral
Biotite (Mica)
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
mineral
Garnet (Almandine)
Almandine, Fe3Al2(SiO4)3
metamorphic
Almandine Garnet in Matrix
Almandine (Fe3Al2(SiO4)3)
metamorphic
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(F,OH)2)
mineral
Biotite (Mica)
K(Mg,Fe)3AlSi3O10(OH,F)2
mineral
Schist
Schist (metamorphic rock)
metamorphic
Green Kyanite
Kyanite (Al2SiO5)
mineral
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Mica Schist
Mica Schist (predominantly Muscovite/Biotite)
metamorphic
Gneiss (High-Grade Metamorphic Rock)
Gneiss (primarily composed of Quartz, Feldspar, and Mica/Amphiboles)
metamorphic
Gneiss (with Mica and Quartz)
Gneissic Metamorphic Rock
metamorphic
Schist
Schist (primarily mica-schist)
metamorphic
Schist
Mica Schist (Composition typically involves Muscovite, Biotite, Quartz, and Feldspar)
metamorphic
Muscovite
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Banded Gneiss
Gneiss
Metamorphic
Dumortierite Quartz
Dumortierite (Al7BCuO15)
metamorphic
Schist
Mica Schist
metamorphic
Schist
Mica Schist (contains muscovite/biotite and quartz)
metamorphic
Biotite (Mica)
Biotite - K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Schist
Mica Schist
metamorphic
Fuchsite with Ruby
Cr-rich Muscovite with Corundum (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Biotite (Black Mica)
Biotite (K(Mg,Fe++)3AlSi3O10(OH,F)2)
mineral
Gneiss (Metamorphic Rock)
Gneiss
metamorphic
Gneiss (Pebble)
Gneiss
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss (Metamorphic Cobble)
Gneiss
metamorphic
Red Garnet (likely Almandine or Pyrope)
Garnet group: X3Y2(SiO4)3 (e.g., Almandine: Fe3Al2Si3O12)
mineral
Biotite Mica in Quartz
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) in Quartz (SiO2)
mineral
Mica Schist
Muscovite Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic