Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Category
Industrial Byproduct (Anthropogenic Rock Like Material)
Browse industrial byproduct (anthropogenic rock like material) specimens identified by the Rock Identifier community.
Learn about Industrial Byproduct (Anthropogenic Rock Like Material) in the encyclopedia
View all →
Coquina
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Chert (Arrowhead or Projectile Point)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chalcedony or Chert/Jasper with secondary mineral staining
SiO2 (for chalcedony/quartz) with possible secondary copper minerals (e.g., CuSiO3·nH2O for chrysocolla, Cu2(CO3)(OH)2 for malachite) or iron oxides/hydroxides.
Mineral, potentially a rock with chalcedony/jasper.
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Anthracite Coal
Anthracite (Carbon-rich metamorphic rock)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert (varietal: Jasper or Flint)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Chert (Light Variety)
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Chrysocolla (with Malachite / Secondary Copper Minerals)
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O
mineral
Sandstone (Graywacke type)
Clastic Sedimentary Rock (Lithic Sandstone)
sedimentary
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Granite
Plutonic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
igneous
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Mixed rock and mineral collection
Mixed lithologies; likely quartz, feldspar, basalt, granite, chert, sandstone, and metamorphic rocks
igneous, sedimentary, metamorphic, mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Red Quartzite River Pebble
Quartzite (SiO2 with iron oxide inclusions)
metamorphic
Limestone
Calcium carbonate (CaCO3)
sedimentary
Travertine
Terrestrial Sedimentary Form of Calcium Carbonate (CaCO3)
sedimentary
Chondrite Meteorite
Stony Meteorite (Ordinary Chondrite)
meteorite
Obsidian with Slate/Tuff
Volcanic glass (SiO2) with associated pyroclastic rock
igneous
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Sandstone / Chert Gravel
SiO2 (Silicon Dioxide based clastic sedimentary rock)
sedimentary
Quartz (Sunstone-like Chalcedony)
Silicon Dioxide (SiO2)
mineral
Chert / Flint Nodule
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily Chalcedony/Quartz, SiO2)
fossil
Chert Cobble / Quartzite River Stone
Microcrystalline Quartz (SiO2) / Quartzite
sedimentary
Agate
Chalcedony (cryptocrystalline quartz)
Mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Sandstone Cobble
Arenite (Sandstone)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Diorite (Spotted or Dalmatian Stone pattern)
Diorite
igneous
Limestone
Sedimentary rock composed mainly of calcite (CaCO3)
sedimentary
Red Sandstone
Arenite (primarily composed of SiO2 with Fe2O3 cement)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2 - Silicon Dioxide / Chalcedony)
metamorphic
Pumice
Pumice (Volcanic Rock / Glass Froth)
igneous
Chert (Brecciated or Veined)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (River Cobble)
Arenite
sedimentary
Red Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3 iron oxide staining)
sedimentary
Diamond
C (Carbon)
mineral