Sandstone (Quartz-rich)
Arenite (composed primarily of SiO2)
sedimentary
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Primarily Composed Of Minerals) in the encyclopedia
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Mica Schist
Metamorphic rock predominantly composed of muscovite or biotite with quartz and feldspar
metamorphic
Sandstone (Quartzite-rich Pebble)
Arenite (composed primarily of SiO2)
sedimentary
Weathered quartz-rich rock, likely quartzite or quartz vein fragment
Quartzite, composed predominantly of SiO₂; possible iron-oxide staining
metamorphic
Granite
Granite (Plutonic Igneous Rock)
igneous
Coarse-grained granite or granitic pegmatite fragment
Granite; primarily quartz, feldspar, and mica
igneous
Sandstone
Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)
Sedimentary Rock
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Granite
Intrusive Igneous Rock
igneous
Garnet in Schist (Mica Schist with Garnet Inclusion)
Garnetiferous Mica Schist (X3Al2(SiO4)3)
metamorphic
Seashell (Calcium Carbonate)
Calcium Carbonate (CaCO3)
mineral
Granitic Gneiss
Gneiss (high-grade metamorphic rock)
metamorphic
Bauxite
Bauxite (Al2O3·2H2O mixed with iron oxides)
sedimentary
Gneiss
Foliated Metamorphic Rock
metamorphic
Likely slate
Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals, chlorite, and quartz
metamorphic
Polished greenstone pebble
Likely serpentinite or chlorite-rich greenschist
metamorphic
Sandstone (Red Sandstone)
Arenite (predominantly SiO2 with Fe2O3 cement)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Granite
Phaneritic Felsic Igneous Rock
igneous
Greenstone (Epidote/Chlorite Rich Rock)
Metabasalt (often contains Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))
metamorphic
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Siltstone
Siltstone (primarily composed of microcrystalline Quartz and Feldspar)
sedimentary
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Unakite
Granitic rock composed of pink orthoclase feldspar, green epidote, and clear quartz
metamorphic
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Granite with Mafic Inclusions
Granite (Phaneritic igneous rock composed of Quartz, Feldspar, and Mica)
igneous
Greenschist (or Serpentinite) with Quartz-Feldspar Vein
Metabasalt / Greenschist Facies Rock
metamorphic
Sandstone
Arenite
sedimentary
Red Sandstone
Arenite (with Iron Oxide)
sedimentary
Sandstone
Arenite (SiO2 composed primarily of quartz)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Lazulite Quartzite
Quartzite with Lazulite (SiO2 with (Mg,Fe)Al2(PO4)2(OH)2)
metamorphic
Dragon Stone
Argillaceous Sedimentary Rock (Ohko Stone)
sedimentary
Polished Jasper / Gneiss (Metamorphic/Siliceous Egg)
Siliceous Gneiss / Banded Metamorphic Rock
metamorphic
Red Sandstone
Arenite (Iron-rich)
sedimentary
Granite Pebble
Granite (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Greenschist
Greenschist facies metamorphic rock
metamorphic
Granite
Felsic intrusive igneous rock
igneous
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
igneous