Feldspar (Orthoclase)
Potassium Feldspar (KAlSi3O8)
Category
Browse sedimentary or igneous fragment specimens identified by the Rock Identifier community.
Feldspar (Orthoclase)
Potassium Feldspar (KAlSi3O8)
Sandstone (River Cobble)
Sandstone (primarily composed of silica, SiO2)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone
Clastic Sedimentary Rock
Sandstone Cobble
Clastic Sedimentary (Sandstone)
Sandstone (specifically an Iron-Concretion)
Arenite with Iron Oxide (Limonite/Goethite) cementation
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
Fossiliferous Limestone (Gastropod / Crinoid Fossil Rock)
Biogenic Sedimentary Rock (CaCO3)
Conglomerate
Conglomerate (clastic sedimentary rock)
Limestone Pebble
Calcium Carbonate (CaCO3)
Sandstone
Arenite
Sandstone
Arenite (composed primarily of SiO2)
Sandstone (likely Arkosic)
Arenite (SiO2 based)
Sandstone
Sedimentary Rock (Quartz Sandstone)
Sandstone
Arenite
Sandstone
Arenite (composed primarily of SiO2)
Sandstone (with potential trace fossils)
Clastic sedimentary rock (primarily SiO2)
Sandstone
Sandstone (clastic sedimentary rock), primarily SiO2
Fossiliferous Limestone
Calcium Carbonate (CaCO3) matrix with biogenic fragments
Sandstone
Arenite (SiO2 primarily)
Sandstone
Arenite (SiO2 based)
Sandstone
Arenite (SiO2 primarily)
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
Sandstone
Arenite (predominantly Quartz Sandstone)
Sandstone
Arenite
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Coquina
Coquina Limestone (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Fossiliferous Limestone
Limestone (CaCO3 - Calcium Carbonate)
Coquina
Biogenic Limestone (Calcium Carbonate, CaCO3)
Coquina
Coquina (Bioclastic Limestone)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Quartz (Milky or Smoky variant)
Silicon Dioxide (SiO2)
Conglomerate
Conglomerate (SiO2, CaCO3 dominant)
Weathered iron-rich concretion or laterite fragment
Ferruginous concretion, likely goethite/limonite (hydrated iron oxides) in a clay-rich matrix
Sandstone
Sedimentary Rock (Quartz arenite or arkose)
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
Sandstone (Ferruginous)
Arenite with iron oxide cement (Fe2O3)
Greenstone (Metabaltic/Greenschist)
Chlorite schist / Meta-basalt
Quartz
Silicon Dioxide (SiO2)