Bauxite
Bauxite (Al2O3·2H2O)
sedimentary
Category
Sedimentary Rock (Possibly Composed Of Various Minerals)
Browse sedimentary rock (possibly composed of various minerals) specimens identified by the Rock Identifier community.
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Bauxite (Pisolitic Bauxite)
Bauxite (mixture of Hydrous Aluminum Oxides)
sedimentary
Mixed Mineral and Rock Collection
Mixed geological specimens (Quartz, Amethyst, Rose Quartz, Jasper, Epidote, Chert)
mineral
Dalmatian Jasper
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Sandstone (with minor weathering/pitting)
Clastic Sedimentary Rock (composed mostly of SiO2)
sedimentary
Brecciated Jasper
Silicon dioxide (SiO2) microcrystalline quartz breccia
sedimentary
Shale or Argillite
Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)
Sedimentary or Metamorphic (low grade)
Sandstone (likely Arkosic or Lithic Sandstone)
Clastic Sedimentary Rock (SiO2 with assorted minerals)
sedimentary
Sandstone
Sandstone (composed primarily of sand-sized minerals or rock grains)
sedimentary
Conglomerate (Greenstone/Pebble Conglomerate)
Polymictic Conglomerate
sedimentary
Sandstone
Arenite
sedimentary
Red Sandstone
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Likely chlorite-bearing schist (possibly greenschist)
Chlorite–quartz–mica schist; commonly contains muscovite/biotite and feldspar
metamorphic
Dalmatian Jasper
Peralkaline Quartz-feldspathic Rock (Arfvedsonite-bearing)
igneous
Gneiss
Gneiss
metamorphic
Sandstone
Arenite
sedimentary
Limestone (fossiliferous or weathered)
Sedimentary carbonate rock primarily composed of calcium carbonate (CaCO3)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Bauxite
Bauxite (Mixture including Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Gneiss
Feldspathic biotite gneiss; a high-grade metamorphic rock composed mainly of quartz, feldspar, and mica
metamorphic
Fossil shark teeth
Probably fossilized shark teeth, possibly *Otodus* or *Carcharhinus* species
fossil
Bauxite
Bauxite (Al2O3·2H2O)
sedimentary
Schist
Schist
Metamorphic
Dalmatian Jasper
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Fossilized Shark Tooth
Carcharocles sp. or Striatolamia sp. (Phosphate/Carbonate mineralized Hydroxyapatite)
sedimentary
Red Sandstone
Clastic sedimentary rock (often dominated by SiO2 with Fe2O3)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (Micaceous)
Arenite (composed primarily of SiO2)
sedimentary
Indigo Gabbro
Gabbro (composed of plagioclase feldspar, pyroxene, and olivine)
igneous
Red Sandstone (Iron-Rich)
Arenite (Fe2O3)
sedimentary
Red Sandstone
Arenite (primarily quartz with iron oxide cement)
sedimentary
Sandstone (Iron-stained)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Laterite
Laterite (no specific mineral formula as it's a rock type)
Sedimentary
Sandstone
Arenite (SiO2 with various cementing minerals)
sedimentary
Brecciated jasper, possibly rainforest jasper or brecciated rhyolite
Brecciated microcrystalline quartz (SiO₂), commonly called jasper; the green portions may contain epidote, chlorite, or iron-bearing silicates, while red-brown areas are typically hematite or other iron oxides
sedimentary
Garnet in Host Rock
Garnet Group (A3B2(SiO4)3)
metamorphic
Quartz Boulder
Silicon Dioxide (SiO2)
mineral
Granite (possibly granitic gneiss)
Felsic plutonic rock dominated by quartz, K-feldspar, plagioclase, biotite and/or hornblende
igneous
Shale
Fissile mudrock (composed primarily of clay minerals and quartz)
sedimentary