Gneiss (Stream-worn Cobble)
Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica)
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
Gneiss
metamorphic
Mica Schist
Mica Schist
metamorphic
Biotite Schist
Biotite Schist
metamorphic
Schist
Mica Schist
metamorphic
Banded gneiss fragment
Gneiss, likely quartz–feldspar–mica gneiss
metamorphic
Granite-like gneiss
Foliated quartz–feldspar–mica gneiss, possibly granitic protolith
metamorphic
Gneiss
High-grade regional metamorphic Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Garnet (Almandine)
Almandine, Fe3Al2Si3O12
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
metamorphic
Weathered quartz-rich metamorphic rock, likely quartzite
Quartzite; predominantly crystalline SiO₂, possibly with mica or feldspar
metamorphic
Gneiss
Foliated quartz–feldspar–mica gneiss
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Gneiss
Gneiss
metamorphic
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Mica Schist
Muscovite/Biotite Schist
metamorphic
Banded gneiss pebble
Gneiss, likely quartz–feldspar–mica gneiss
metamorphic
Schist
Mica Schist
metamorphic
Gneiss (Green Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Greenschist
Chlorite schist
metamorphic
Biotite schist (probable)
Mica schist, chiefly quartz, feldspar, and biotite mica
metamorphic
Sillimanite
Al2O3(SiO2)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Granite or granitic pebble
Granite; chiefly quartz (SiO₂), feldspar, and mica/amphibole
igneous
Mica schist (likely biotite-rich schist)
Mica schist, dominated by biotite mica (K(Mg,Fe)₃AlSi₃O₁₀(F,OH)₂), with possible quartz and feldspar
metamorphic
Banded gneiss, probably granitic gneiss
Foliated gneiss composed mainly of quartz (SiO₂), feldspar—orthoclase/microcline and plagioclase—and dark mica, commonly biotite K(Mg,Fe)₃AlSi₃O₁₀(F,OH)₂
metamorphic
Garnet (likely Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Fuchsite (Chrome Mica)
K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Corundum (Sapphire and Ruby)
Aluminum Oxide (Al2O3)
mineral
Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH,F,O)4)
mineral
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Mica Schist
Muscovite/Biotite Schist
metamorphic
Gneiss
Gneiss (pronounced 'nice')
Metamorphic Rock
Quartz-rich metamorphic rock (likely mica schist or gneiss)
Quartz–feldspar–mica assemblage; probable biotite schist/gneiss
metamorphic
Quartz (likely Rose Quartz or Milky Quartz based on color)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Biotite-bearing metamorphic rock, likely gneiss or schist
Mica-rich quartz–feldspar gneiss/schist; exact identification requires testing
metamorphic
Schist (Garnet-Mica Schist)
Garnet-Mica Schist (X-Y)3Z2(SiO4)3
metamorphic
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
metamorphic
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic