Sandstone
Quartz Arenite / Clastic Sedimentary Rock
Category
Browse sedimentary or igneous fragment specimens identified by the Rock Identifier community.
Sandstone
Quartz Arenite / Clastic Sedimentary Rock
Flagstone
Sedimentary Sandstone / Flagstone
Sandstone (Red/Brown)
Arenite (composed primarily of SiO2)
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone
Sedimentary Clastic Rock
Sandstone
Clastic Sedimentary Rock
Sandstone
Arenite (SiO2 based)
Sandstone
Arenite
Brecciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Sandstone
Arenite (SiO2 with various cementing minerals)
Brecciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Sandstone
Arenite (SiO2 primarily)
Concrete
Anthropogenic Conglomerate
Concrete with Aggregate
Artificial Conglomerate (Cement and Aggregate)
Magnetite / Ironstone
Magnetite (Fe3O4)
Chert / Flint
Microcrystalline Quartz (SiO2)
Chert (Flint)
Silicon dioxide (SiO2) - Microcrystalline Quartz
Chert (Flint Gravel)
Silicon Dioxide (SiO2)
Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
Sandstone
Sedimentary Rock (Quartz Sandstone)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (predominantly SiO2)
Sandstone (Micaceous)
Clastic Sedimentary Rock - Micaceous Litharenite (SiO2 principal)
Clear quartz crystal fragments
Quartz (silicon dioxide, SiO₂)
Amethyst Geode Piece
Silicon Dioxide (SiO2)
Fossiliferous Limestone
Biogenic Sedimentary Rock (primarily CaCO3)
Orange Calcite
Calcium Carbonate (CaCO3)
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
Felsic Tuff
Pyroclastic volcanic rock (Tuff)
Coquina and Oyster Fossil Rock
Coquina limestone (Calcium Carbonate, CaCO3) containing fossilized Crassostrea / bivalve shells
Limestone (or Sandstone)
Calcium Carbonate (CaCO3) / Silica (SiO2)
Sandstone/Quartzite
Sedimentary Rock (composed mainly of SiO2)
Sandstone (Greywacke/Siltstone variant)
Arenite / Wacke (SiO2 with diverse mineral inclusions)
Sandstone
Clastic Sedimentary Rock (composed mostly of SiO2)
Red Sandstone
Sedimentary Quartz Arenite / Arkose
Sandstone with Manganese Staining
Quartz Arenite / Sedimentary Rock
Sandstone
Arenite
Sandstone
Arenite (SiO2 based)
Native American Hammerstone / Pitted Stone
Modified lithic artifact (often quartzite, basalt, or granite)
Sandstone (Heart-shaped pebble)
Sedimentary Quartz Sandstone