River Cobble (Quartzite or Gneiss)
Metamorphic crystalline rock (predominantly SiO2 based)
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.
Learn about Metamorphic (Likely Gneiss Or Schist Based On Texture) in the encyclopedia
View all →
Kyanite (Green and Blue varieties)
Kyanite (Al2SiO5)
mineral
Micaceous schist (probable)
Mica schist, dominated by muscovite/biotite with quartz and feldspar
metamorphic
Mica Schist with Garnet
Garnetiferous Mica Schist
metamorphic
Fairy Stone (Staurolite Twin)
Staurolite (Fe,Mg,Zn)2Al9Si4O22(OH)2
metamorphic
Staurolite
Staurolite (Fe2Al9O6(SiO4)4(O,OH)2)
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Staurolite (Fairy Stone)
Staurolite (formula: Fe2+2Al9Si4O23(OH))
metamorphic
Sandstone
Arenite (specifically Iron-stained Quartz Sandstone)
sedimentary
Corundum (Sapphire variant)
Aluminium oxide (Al2O3)
mineral
Garnet (Almandine)
Almandine Fe3Al2(SiO4)3
mineral
Corundum (Ruby Variety)
Corundum (Al2O3)
mineral
Schorl (Black Tourmaline)
Sodium Iron Aluminum Borosilicate Hydroxide - NaFe2+3Al6Si6O18(BO3)3(OH)3OH
mineral
Greenschist
Greenschist (Chlorite Schist)
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2 mixed with SiO2)
metamorphic
Banded gneiss (likely amphibolite-rich gneiss)
Banded gneiss; composition commonly quartz, feldspar, mica and/or amphibole
metamorphic
Garnet
Almandine/Pyrope Garnet (X3Y2(SiO4)3)
gemstone
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
mineral
Likely galena-bearing metamorphic sulfide ore
Galena (PbS), possibly with pyrite and/or sphalerite in a schistose host
mineral
Fairy Stone (Staurolite Cross)
Staurolite (Fe2Al9O6(SiO4)4(O,OH)2)
mineral
Gneiss
High-grade Metamorphic Gneiss
metamorphic
Greywacke (Briarcliff Schist/Gneiss)
Manhattan Schist / Fordham Gneiss complex
metamorphic
Khondalite
Garnet-sillimanite-graphite schist/gneiss
metamorphic
Gneiss
Metamorphic Gneiss
metamorphic
Mica Schist
Schist (muscovite/biotite rich regional metamorphic rock)
metamorphic
Polished pink-and-black granite or gneiss
Granite–gneiss, chiefly quartz, feldspar, and biotite/amphibole
igneous
Pink Gneiss / Pink Granite Gneiss
Felsic Gneiss (dominated by Orthoclase Feldspar and Quartz)
metamorphic
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Graphite Schist
C (Carbonaceous Schist)
metamorphic
Mica Schist
Mica Schist (Quartz-Mica Schist)
metamorphic
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
metamorphic
Fuchsite
Fuchsite (a variety of Muscovite mica, K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Gneiss
Gneiss
metamorphic
Black Sapphire
Corundum (Al2O3 with iron and titanium impurities)
mineral
Mica Schist
Mica Schist (contains Muscovite KAl2(AlSi3O10)(OH)2)
metamorphic
Garnet-Bearing Gneiss
Garnetiferous Feldspathic Gneiss
metamorphic
Garnet Gneiss or Mica Schist with Garnet
Almandine Garnet-bearing Gneiss
metamorphic
Sandstone, Quartzite, and River Pebbles
Silicon Dioxide (SiO2) based Sedimentary/Metamorphic structures
Sedimentary and Metamorphic
Granitoid Gneiss with Feldspar Vein
Gneiss (High-grade Metamorphic Rock) with Potassium Feldspar (KAlSi3O8)
metamorphic
Gneiss
Gneiss
metamorphic
Tumbled Ruby
Corundum (Al2O3)
gemstone