Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
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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Biotite Schist
Biotite Schist (containing K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Quartzite with Chert inclusions
Metamorphosed Quartz-rich Rock (SiO2)
metamorphic
Green Schist
Greenschist (Chlorite Schist)
metamorphic
Mica Schist
Schist (Biotite/Muscovite rich)
metamorphic
Garnet in Schist
Almandine Garnet in Mica-Schist (Fe3Al2(SiO4)3)
metamorphic
River Stones (Quartzite and Sandstone)
Quartzite / Sedimentary Rock (SiO2 dominant)
sedimentary
Not a geological specimen
N/A (man-made object)
N/A
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Quartz composition)
metamorphic
Fuchsite (Green Muscovite in Quartz)
K(Al,Cr)2(AlSi3O10)(OH)2 - Chromium-rich Muscovite
metamorphic
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Biotite-rich granite or granitic gneiss
Granite; quartz–feldspar–biotite assemblage
igneous
Gneiss
Gneiss (high-grade metamorphic rock)
metamorphic
Graphite-bearing schist (probable)
Graphite–quartz–mica schist; chiefly graphite (C), quartz (SiO₂), and mica
metamorphic
Gneiss
Gneiss
metamorphic
Sandstone with Secondary Mineral Encrustation
Arenite with Silica/Calcite deposits (SiO2 or CaCO3)
sedimentary
Quartz-veined metamorphic rock, likely greenschist or altered basalt
Chlorite–actinolite schist or metabasalt with a milky quartz vein
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Fuchsite
Chromium-bearing Muscovite - K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Banded Gneiss
Gneiss
metamorphic
Muscovite Schist
Mica Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Garnet Schist
Almandine Garnet-bearing Mica Schist
metamorphic
Tumbled ruby-bearing corundum
Corundum (Al₂O₃), likely ruby variety
mineral
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Mica Schist with Quartz
Mica Schist (KAl2(AlSi3O10)(OH)2 / SiO2)
metamorphic
Weathered granite or granitic gneiss slab
Granitic rock, chiefly quartz, feldspar, and mica; exact identification is uncertain from the photograph
igneous
Biotite Mica
Biotite, K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gravel / Small Pebble
Rock Fragment (Gravel)
sedimentary
Mica schist
Muscovite–biotite schist, commonly with quartz and feldspar
metamorphic
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Mica Schist with Quartz
Mica Schist (principally Muscovite and Biotite with Quartz veins)
metamorphic
Tumbled dark gray stone, likely basalt
Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, commonly with olivine
igneous
Honey calcite specimen
Calcite (calcium carbonate, CaCO₃)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Painted River Rock
Artificially Coated Sedimentary Rock
sedimentary