Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Category
Mineral (Pseudomorph)
Browse mineral (pseudomorph) specimens identified by the Rock Identifier community.
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Granite
Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive igneous rock composed mainly of quartz, alkali feldspar, and plagioclase
igneous
Granite
Intrusive Igneous Rock
igneous
Granite Pebble
Intrusive Igneous Rock
igneous
Tumbled Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Intrusive Igneous Rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Petrified Wood
Silicified Wood (SiO2)
fossil
Black Beach Pebble / Basalt Pebble
Basalt / Mafic Volcanic Rock
igneous
River Pebble (Gneiss/Schist mix)
Metamorphic rock aggregate
metamorphic
Granite
Phaneritic Felsic Plutonic Rock
igneous
Sandstone
Arenite (SiO2 primarily)
sedimentary
Granite
Granite
igneous
Human Skin (Epidermis/Dermis)
Integumentary tissue (High content of hydroxyapatite in bones, though the surface is biological)
Mineral-like biological tissue
Pegmatite (Granitic Pegmatite with Quartz, Feldspar, and Mica)
Granitic Pegmatite
igneous
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix
metamorphic
Prehnite with Epidote
Prehnite (Ca2Al(AlSi3O10)(OH)2) with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
mineral
Dendritic Agate
Silicon Dioxide with Manganese/Iron oxide inclusions (SiO2)
Mineral
Granite
Felsic intrusive igneous rock
igneous
Granite with Biotite Inclusions
Intrusive Igneous Rock (Quartz, Feldspar, Biotite)
igneous
Granite
Intrusive Igneous Rock
igneous
Sandstone
Clastic Sedimentary Rock
sedimentary
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive igneous rock (Felsic)
igneous
Granite
Plutonic Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Felsic intrusive igneous rock
igneous
Basalt with Jasper Vein
Extrusive Igneous Rock with Quartz/Chalcedony Vein
igneous
Basalt
Extrusive Igneous Rock
igneous
Obsidian
Volcanic Glass (SiO2 with impurities)
igneous