Fuchsite in Quartz
K(Al,Cr)2(AlSi3O10)(OH)2 (Muscovite with Chromium)
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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Schist (Kyanite Schist)
Kyanite-Mica Schist (primarily Al2SiO5, KAl2(AlSi3O10)(OH)2, and SiO2)
metamorphic
Gneiss
Metamorphic Gneiss
metamorphic
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in Slate/Schist
metamorphic
Garnet-Mica Schist
Schist (variety with Almandine Garnet, Fe3Al2(SiO4)3)
metamorphic
Gneiss (Metamorphic Pebble)
Gneiss (SiO2-rich metamorphic rock)
metamorphic
Blue Kyanite in Quartz
Kyanite (Al2SiO5)
mineral
Pyrite-bearing metamorphic rock (probable pyrite schist)
Schist containing pyrite (FeS₂), with probable quartz and mica
metamorphic
Pyrite-bearing metamorphic rock (probable schist or quartzite)
Quartz–mica schist with disseminated pyrite; approximate composition SiO₂ + phyllosilicates + FeS₂
metamorphic
Schist (Micaceous)
Mica Schist
metamorphic
Pebble (likely Sandstone or Granitic Pebble)
Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)
Rock (likely Sedimentary)
Schist
Mica Schist
metamorphic
Mica Schist
Mica Schist (Quartz-Biotite-Muscovite Schist)
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Biotite phyllosilicates)
metamorphic
Quartz-rich feldspathic rock, likely granite or granitic gneiss
Granite/granitic gneiss; chiefly quartz (SiO₂), feldspar, and minor mica
igneous
Quartzite Cobble
Quartzite (SiO2 based metamorphic rock)
metamorphic
Greenschist
Chlorite-actinolite schist
metamorphic
Schist
Mica Schist
metamorphic
Garnet-Bearing Gneiss
Almandine-Garnet Gneiss
metamorphic
Raw Emerald in Schist Matrix
Beryl (Be3Al2Si6O18) in Mica Schist
Mineral in Metamorphic Rock
Mica Schist
Mica Schist (primarily Muscovite or Biotite within a foliated matrix)
metamorphic
Garnet-Bearing Schist
Almandine Garnet Schist
metamorphic
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
man-made (synthetic rock)
Biotite Mica
K(Mg, Fe)3(AlSi3O10)(F, OH)2
mineral
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Mica Schist
Mica Schist (Composition typically contains Muscovite: KAl2(AlSi3O10)(OH)2 or Biotite: K(Mg,Fe)3AlSi3O10(OH)2 along with Quartz and Feldspar)
metamorphic
Greenschist
Greenschist (Chlorite Schist)
metamorphic
![Schist (Mica Schist (primarily Muscovite [KAl2(AlSi3O10)(OH)2] or Biotite)) — metamorphic](https://media.rockidentification.com/86a0d3cc-d977-4de0-9207-7dc816027b49-thumbnail.jpg)
Schist
Mica Schist (primarily Muscovite [KAl2(AlSi3O10)(OH)2] or Biotite)
metamorphic
Coarse Sand or Fine Gravel
Detrital Sedimentary Fragments (mostly SiO2)
sedimentary
Hard Sandstone (Quartzite)
Quartz-rich Sedimentary Rock (Proto-Quartzite)
metamorphic
Aventurine
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Red Garnet
Pyrope-Almandine series (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)
mineral
Mica Schist
Muscovite/Biotite Schist
metamorphic
Banded Gneiss
Gneiss (Metamorphic high-grade rock)
metamorphic
Greenschist
Greenschist (Chlorite Schist)
metamorphic
Jade (likely Nephrite Jade based on appearance)
Nephrite (a variety of actinolite, Ca2(Mg,Fe)5Si8O22(OH)2)
Mineral
Granite or Granitic Gneiss
Granitoid / Gneiss
Igneous / Metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Weathered quartz-rich rock, likely granite or granitic gneiss
Granite–gneiss assemblage; mainly quartz (SiO₂), feldspar, and minor mica/amphibole
igneous