Schist
Schist (metamorphic rock)
Category
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
Schist
Schist (metamorphic rock)
Quartz
Quartz (SiO₂)
Banded Gneiss
Gneiss (quartz-feldspar-biotite metamorphic rock)
Granite
Granite
Sandstone (likely Quartzose Sandstone with mineral staining)
Arenite (composed mainly of SiO2)
Basalt with Iron Oxidation
Extrusive Mafic Igneous Rock (composed of Plagioclase and Pyroxene)
Greenstone / River Jadeite pebble
Metavolcanic rock / Chlorite or Actinolite-rich schist
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
Diorite Gneiss
Foliated Diorite Gneiss
Greenschist
Greenschist facies rock (containing chlorite, actinolite, albite, and epidote)
Sandstone (with cross-bedding)
Arenite (composed primarily of Quartz: SiO2)
Gneiss (Metamorphic Pebble)
Gneissic Metamorphic Rock
Sandstone (likely a river or beach pebble)
Sandstone (a clastic sedimentary rock)
Granitoid (Commonly Granite)
Phaneritic Felsic Igneous Rock
Unakite
Unakitized granodiorite / Quartz-Epidote-Feldspar rock
Unakite (Epidotized Granite)
Epidote-Feldspar-Quartz Rock
Barite Rose (Desert Rose)
Barium Sulfate (BaSO4)
Blue Quartzite
Quartzite (primarily SiO2 with inclusions)
Greenstone
Greenschist (primarily composed of chlorite, actinolite, and epidote)
Bumblebee Jasper
Fossiliferous Volcanic Rock (composed of Calcium Carbonate, Manganese Oxides, and Arsenic Sulfides)
Orthoclase Feldspar
Potassium Aluminum Silicate (KAlSi3O8)
Banded Sandstone
Arenite (composed primarily of Quartz: SiO2)
Granite
Granite (Felsic Intrusive)
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
Granite
Phaneritic Felsic Igneous Rock
Unakite
Epidotized Granite
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
Pink Granite
Phaneritic intrusive felsic igneous rock
Mica Schist
Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)
Gneiss
Gneiss
Unakite (Epidotized Granite)
Unakite; primarily composed of Epidote (Ca2(Al,Fe)3(SiO4)3(OH)), Orthoclase (KAlSi3O8), and Quartz (SiO2)
Greenstone with Quartz Veining
Epidiorite or Metabasalt with SiO2 (Quartz) veins
Greenstone
Metabasalt / Chlorite-Epidote Schist
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 cement)
Mica Schist
Mica Schist (primarily Muscovite and Quartz)
Gneiss with Quartz Veining
Gneiss (High-grade regional metamorphic rock)
Amphibolite (specifically Hornblende Schist/Gneiss)
Amphibole-rich Metamorphic Rock
Schist
Mica Schist (primarily Muscovite [KAl2(AlSi3O10)(OH)2] or Biotite)
Sandstone Concretion
Sedimentary concretion
Quartzite with Iron Inclusions
Metamorphic Quartzite (SiO2 with Fe2O3 trace impurities)
Gneiss
Gneiss
Green Quartzite
Quartzite (primarily SiO2 with chromium-rich mica/fuchsite impurities)