Clear Quartz
Silicon Dioxide (SiO2)
Category
Browse anthropogenic sedimentary (man made) specimens identified by the Rock Identifier community.
Clear Quartz
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Pink Quartz
Silicon Dioxide (Quartz), SiO2
Mica
Mica group (often Muscovite or Biotite)
Clear Quartz
SiO2 (Silicon Dioxide)
Conglomerate (Red Sandstone variety)
Clastic Sedimentary Rock (Conglomeratic Sandstone)
Tumbled brecciated jasper
Silica-rich microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and other mineral inclusions
Sedimentary Strata of the Badlands (Mudstone, Siltstone, and Sandstone)
White River Group (Brule and Chadron Formations)
Jasper (Sedimentary variety)
Silicon Dioxide (SiO2) with impurities
Chalk (Sedimentary Pebble)
Calcium Carbonate (CaCO3) - Biogenic Limestone
Fossiliferous Sedimentary Rock (Coquina/Limestone)
Fossiliferous Calcarenite / Bioclastic Limestone
Weathered brown stone, possibly basalt or iron-rich sedimentary rock
Indeterminate from photograph; likely fine-grained mafic rock (basalt) or ferruginous sandstone
Sandstone
Arenite
Sandstone with Quartz Sphere
Arenite (SiO2-rich sedimentary rock) with Quartzite/Rose Quartz sphere
Flint or chert flake
Microcrystalline quartz (SiO₂), commonly chalcedony with possible impurities
Sandstone
Sandstone (composed mainly of SiO2)
Sandstone
Arenite
Limestone with Calcite Veining
Sedimentary Rock (Calcium Carbonate, CaCO3)
Sandstone (Calcareous)
Clastic sedimentary rock (primarily SiO2 with CaCO3 cement)
Sandstone Pebble
Arenite (SiO2 primarily)
Sandstone
Arenite
Limestone
Sedimentary rock composed primarily of Calcite (CaCO3)
Sandstone
Arenite (primarily SiO2)
Limestone with Calcite Veins
Sedimentary Calcium Carbonate (CaCO3)
Sandstone
Arenite (SiO2 principal component)
Granular Sandstone
Arenite (variable composition, primarily SiO2)
Limestone (with Calcite Veining)
Calcium Carbonate (CaCO3)
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with Fe2O3)
Sandstone (Quartzite-rich)
Clastic sedimentary rock (SiO2 primarily)
Sandstone (Ferruginous)
Arenite (SiO2 with iron oxide impurities)
Sandstone
Arenite (SiO2 based)
Sandstone
Arenite (primarily SiO2)
Limestone (Micritic)
Sedimentary rock mainly composed of Calcium Carbonate (CaCO3)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone (Red/Brown Variety)
Arenite (SiO2 with iron oxide impurities)
Sandstone
Arenite (primarily SiO2)
Sandstone (likely Arkosic)
Clastic Sedimentary Rock (Sandstone)
Limestone
Carbonate rock (CaCO3)
Sandstone (Pebble/Cobble)
Arenite (primarily SiO2)
Sandstone
Arenite (SiO2 based)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Sandstone (likely with Quartz Veining)
Arenite (primarily SiO2)