Tektite
Impactite (Natural Silicate Glass)
meteorite
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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Sandstone
Arenite (primarily Quartz-based Sandstone)
sedimentary
Biotite Schist
Metamorphic Rock (Schist)
metamorphic
Quartz-veined metamorphic rock, likely greenschist or altered metavolcanic
Chlorite–actinolite–epidote-bearing metavolcanic rock with quartz veins; exact identification requires testing
metamorphic
Graphic Granite (Zebra Rock)
Pegmatitic Granite (composed of Quartz and K-Feldspar)
igneous
Quartzite
Metamorphic Rock (composed mainly of SiO2)
metamorphic
Quartzite (River Cobble)
Metamorphic Rock (composed predominantly of SiO2)
metamorphic
Sandstone
Quartzose Sandstone (Sedimentary Rock)
sedimentary
Red Sandstone
Arenite (with Iron Oxide cement)
sedimentary
Sandstone Pebble
Arenite
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Nephrite Jade
Nephrite
Mineral/Rock
Sandstone (Quartzite-rich Pebble)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (primarily Quartz-rich sedimentary rock)
sedimentary
Sandstone
Arenite (SiO2 composed primarily of quartz)
sedimentary
Bumblebee Jasper
Carbonate-rich volcanic sediment with arsenic and sulfur inclusions
sedimentary
Greenschist
Greenschist facies metamorphic rock
metamorphic
Sandstone (Ferruginous)
Arenite (Fe2O3 stained)
sedimentary
Granite
Intrusive Igneous Rock
igneous
Granite
Granite (Phaneritic Acidic Igneous Rock)
igneous
Bauxite (Iron-stained Chert / Ironstone Aggregate)
Hydrous aluminum oxide mixture (mainly Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Goethite α-Fe3+O(OH))
sedimentary
Bauxite
Bauxite (Al2O3·2H2O)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Quartz (Milky Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone
Arenite (Sedimentary rock comprising sand-sized grains)
sedimentary
Quartzite (River Stone)
Quartzite (SiO2)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Red Granite Pebble
Intrusive Felsic Igneous Rock (Granite)
igneous
Sandstone Pebble
Arenite (primarily SiO2)
sedimentary
Weathered River Rock (likely Chert or Basalt with algae)
Silicon dioxide (SiO2) with organic biofilm
sedimentary
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Sandstone (composed primarily of sand-sized minerals or rock grains)
sedimentary
Sandstone (Quartz-rich)
Arenite (Quartz Arenite)
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Shiva Lingam
Cryptocrystalline Quartz (Jasper/Agate)
sedimentary
Dalmatian Stone (commonly Dyed)
Dalmatian Jasper (Peralkaline igneous rock)
igneous
Sandstone (Wonderstone)
Arenite (composed primarily of SiO2 with Fe2O3 impurities)
sedimentary
Gneiss (Metamorphosed Granitic Rock)
Gneiss (composed mainly of quartz, feldspar, biotite, and/or hornblende)
metamorphic
Concrete
Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)
sedimentary (anthropogenic / man-made)