Sandstone
Clastic Sedimentary Rock (composed mostly of quartz and/or feldspar)
Category
Browse mineral and sedimentary specimens identified by the Rock Identifier community.
Sandstone
Clastic Sedimentary Rock (composed mostly of quartz and/or feldspar)
Ferruginous Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
Sandstone Pebble
Arenite (primarily SiO2)
Sandstone
Arenite (variable SiO2 composition)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Fe2O3 staining)
Botryoidal Chalcedony in Geode/Vug
Silicon Dioxide (SiO2)
Conglomerate
Clastic Sedimentary Conglomerate (SiO2, CaCO3 dominant)
Sandstone (Ferruginous)
Arenite (Fe2O3 rich)
Quartz
Quartz (SiO2 - Silicon Dioxide)
Schist
Schist (various mineralogical compositions including mica, chlorite, talc, etc.)
Sandstone
Arenite (composed primarily of SiO2)
K2 Jasper (K2 Granite)
Azurite in Granite (Biotite Granite containing Azurite)
Carnelian
Carnelian (Chert/Chalcedony) - SiO2
Amber
Amber (C10H16O)
Greenstone / Greenschist
Greenschist facies metamorphic rock
Petrified Wood
Silicified wood (Quartz/Chalcedony - SiO2)
Hag Stone
Porous sedimentary rock (typically Flint, Chert, or Sandstone) with naturally occurring holes
Red Sandstone (Old Red Sandstone)
Ferruginous Sandstone (SiO2 + Fe2O3)
Fossiliferous Limestone
Limestone (CaCO3 - Calcium Carbonate)
Sandstone (Quartzite-rich)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone (specifically Banded Sandstone)
Clastic sedimentary rock (primarily SiO2)
Breccia
Breccia (Clastic Sedimentary Rock)
Gneiss
Gneiss (High-grade metamorphic rock)
Garnet Schist
Almandine Garnet Schist
Gneiss
Gneiss (High-grade Metamorphic Rock)
Gneiss (specifically Banded Gneiss)
Gneiss
Gneiss
Gneiss
Sandstone with Iron Oxide
Arenite (SiO2 with Fe2O3 inclusions)
Orange Calcite
Calcium Carbonate (CaCO3)
Sand and Gravel (Quartz-rich)
Unconsolidated fluvial/beach sediment (primarily Silica/SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Sandstone
Arenite (primarily SiO2)
Chert (Flint)
Chert (SiO2)
Quartz
Silicon Dioxide (SiO2)
Sandstone (with Quartz veining)
Arenite (primarily SiO2)
Fossilized Shark Tooth (Partial)
Elasmobranchii (fossil tooth fragment)
Limestone (River Pebble)
Sedimentary Calcium Carbonate (CaCO3)
Orange Calcite
Calcite (CaCO3)
Limestone with Calcite
Sedimentary Calcium Carbonate (CaCO3)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz (Milky or Cloudy Quartz)
Silicon Dioxide (SiO2)