Sandstone
Arenite (primarily Quartz-based Sandstone)
sedimentary
Category
Industrial Byproduct (Anthropogenic Rock Like Material)
Browse industrial byproduct (anthropogenic rock like material) specimens identified by the Rock Identifier community.
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Sandstone (Ferruginous)
Arenite (SiO2 with Iron Oxide impurities)
sedimentary
Chalcedony (Botryoidal or Tumbled)
Chalcedony (SiO₂)
mineral
Raw greenish-blue quartz-bearing mineral specimen
Likely fluorite or chalcedony/quartz; exact identification requires hardness and crystal tests
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Granite Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone
Quartz Sandstone (predominantly)
Sedimentary
Mica Schist with Quartz
Mica Schist (KAl2(AlSi3O10)(OH)2 / SiO2)
metamorphic
Petrified Wood
Silicified Wood (primarily SiO2 - Silicon Dioxide)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone with Iron Staining
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Garnet Schist
Garnetiferous Micaceous Schist
metamorphic
Sandstone
Arenite (primarily Quartz Arenite)
sedimentary
Quartz Geode with Calcite
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)
mineral
Chalcedony (Fire Agate or Carnelian variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Chert (Jasper/Flint variation)
Chert (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (SiO2 with Fe-oxide cement)
sedimentary
Sandstone (with potential trace fossils)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartzite (River Cobble)
Metamorphic Quartz-rich Rock
metamorphic
Weathered iron-rich rock, possibly meteorite
Uncertain; likely goethite/hematite-rich material, with meteorite possibility
mineral
River Pebble (Siltstone / Sandstone Pebble)
Sedimentary Rock (Quartz, Feldspar, Clay Minerals)
sedimentary
Red Sandstone
Arenite (Hematitic / Ferruginous Sandstone)
sedimentary
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (with iron oxide cement, Fe2O3)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Sedimentary Rock (Quartz Arenite)
sedimentary
Agate
Agate (Microcrystalline Quartz, SiO2)
mineral
Pink Granite
Phaneritic Felsic Igneous Rock (composed of orthoclase, quartz, and plagioclase)
igneous
Pumice
Pumice (a vesicular volcanic glass)
igneous
Basalt (Vesicular)
Mafic Volcanic Rock (rich in Magnesium and Iron)
Igneous
Granitic Gneiss Pebble
Gneiss (felsic metamorphic rock)
metamorphic
Drupa Quartz (Sparkly Drusy Quartz on Matrix)
Crystalline Silicon Dioxide (SiO2) on host rock
mineral
Petrified Wood
Silicified Wood (primarily SiO₂ / Silicon Dioxide)
mineral
Native Copper in Basalt
Cu-element in Mafic Volcanic Rock (Basalt)
igneous
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Quartz pebble (Quartzite / Chert)
Silicon Dioxide (SiO2)
sedimentary
Banded Agate
Agate (Cryptocrystalline Quartz, SiO2)
mineral