Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Category
Metamorphic Rock (Composed Of Multiple Minerals)
Browse metamorphic rock (composed of multiple minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Composed Of Multiple Minerals) in the encyclopedia
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Sandstone
Clastic Sedimentary Rock (composed primarily of Quartz: SiO2)
sedimentary
Limestone
Sedimentary rock composed of Calcium Carbonate (CaCO3)
sedimentary
Weathered granitic rock (tentative)
Granite, composed mainly of quartz, feldspar, and mica
igneous
Granodiorite
Phaneritic intrusive igneous rock (intermediate composition)
igneous
Rounded sandstone pebble
Quartz-rich sandstone; commonly arkose or lithic sandstone
sedimentary
Sandstone
Arenite (SiO2 based with various mineral cements)
sedimentary
River Siltstone Pebble
Siltstone (primarily composed of silica and clay minerals)
sedimentary
Wishing Stone with Quartz Veins
Quartzite or Quartz-veined Metamorphic Rock (composed mainly of SiO2)
metamorphic
Red Sandstone
Arenite (Fe2O3 rich)
sedimentary
Granite
Intrusive Igneous Rock
igneous
Greenschist
Greenschist (composed mainly of chlorite, epidote, actinolite, and albite)
metamorphic
Greenschist
Greenschist (composed mainly of actinolite/tremolite, chlorite, and epidote)
metamorphic
Quartzite (Milky)
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Quartzite Pebble
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Siltstone
Siltstone (primarily composed of quartz and clay minerals)
sedimentary
Sandstone
Arenite (mostly Quartz-based)
sedimentary
Quartzite (River Pebble)
Quartzite (composed primarily of Silica, SiO2)
metamorphic
Riverstone (Quartzite Pebble)
Quartzite (primarily SiO2)
metamorphic
Unakite
Altered Granite (Granitic Metamorphic Rock)
metamorphic
Sandstone
Arenite
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartzite
Metamorphic Rock (composed primarily of Quartz, SiO2)
metamorphic
Mixed stream gravel and cobbles
Polylithic alluvial deposit; individual clasts are not identifiable at this resolution
sedimentary
Fossil oyster shell
Fossilized bivalve, likely Ostrea or Crassostrea; calcite (CaCO₃) shell
fossil
Unakite
Granitic Unakite (Alteration rock composed of pink orthoclase feldspar, green epidote, and clear quartz)
metamorphic
Greenschist / Serpentinite Cobble
Greenschist (composed primarily of chlorite, actinolite, and epidote)
metamorphic
Quartz-Veined Slate or Greenstone
Metamorphic rock with quartz vein (SiO2)
metamorphic
Sandstone and Conglomerate pebbles
Sedimentary clastic rock
sedimentary
Slate
Low-grade Metamorphic Rock (composed of quartz, illite, chlorite)
metamorphic
Granite
Granite (plutonic igneous rock)
igneous
Tumbled granite, likely orbicular or graphic granite
Granite; chiefly quartz, alkali feldspar, plagioclase, and biotite/amphibole
igneous
Dalmatian Stone
Dalmatian Stone (a fine-grained igneous rock, often misidentified as Dalmatian Jasper)
igneous
Quartzite
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Banded Gneiss
Gneiss (high-grade metamorphic silicate rock)
metamorphic
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Biotite gneiss (probable)
Foliated gneiss composed mainly of quartz, feldspar, and biotite mica
metamorphic
Schist
Mica Schist
metamorphic
Quartzite (River-worn)
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Quartzite
Metamorphic rock primarily composed of Quartz (SiO2)
metamorphic
Red Quartzite River Stone
Metamorphic Rock (composed mainly of Quartz, SiO2)
metamorphic