Chert (Brecciated Chert)
Silicon Dioxide (SiO2)
Category
Browse sedimentary or igneous fragment specimens identified by the Rock Identifier community.
Chert (Brecciated Chert)
Silicon Dioxide (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
White Agate / Chalcedony
Silicon Dioxide (SiO2)
Micaceous schist (likely biotite schist)
Schist dominated by biotite mica, quartz, and feldspar
Limestone
Calcium Carbonate (CaCO3)
Sandstone (River Pebble)
Quartz Arenite / Lithic Sandstone
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
Red Sandstone Pebble
Arenite (Quartz Sandstone / Hematitic Sandstone)
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
Red Sandstone
Arenite (Ferruginous Sandstone)
Sandstone (Greywacke)
Arenite / Wacke (SiO2 + varied clasts)
Chert (Chert breccia)
SiO2 (Silicon Dioxide)
Sandstone with Iron Staining
Arenite with Limonite/Hematite inclusions (SiO2 + Fe2O3/FeO(OH))
Sandstone
Arenite (primarily Quartz Arenite)
Breciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Sandstone
Arenite (SiO2 primarily)
Sandstone
Clastic Sedimentary Rock (composed mostly of quartz and/or feldspar)
Ferruginous Sandstone
Sandstone (rich in iron oxides/hydroxides)
Sandstone with Magnetite and Iron Staining
Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)
Sandstone (Quartzite-rich Pebble)
Arenite (composed primarily of SiO2)
Red Sandstone
Arenite (with Iron Oxide)
Sandstone (Green/Yellow Siltstone variant)
Arenite or Siltstone (primarily SiO2 with mineral staining)
Sandstone (specifically Red Sandstone)
Arenite (primarily Quartz, SiO2)
Red Sandstone
Arenite
Sandstone Pebble
Arenite (primarily SiO2)
Sandstone (Quartzose Sandstone Pebble)
Arenite (primarily SiO2)
Sandstone (Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
Sandstone
Arenite (variable SiO2 composition)
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Biogenic Inclusions
Sandstone
Arenite (SiO2 based with various mineral cements)
Sandstone with Iron Staining
Arenite (SiO2 based with Fe2O3 staining)
Quartz-veined Sedimentary Rock
Hydrothermally veined Clastic Sedimentary Rock (SiO2 veins in Matrix)
Sandstone
Arenite (primarily SiO2)
River Stone (likely Siltstone or fine-grained Sandstone)
Clastic Sedimentary Rock (Lithic Wacke / Siltstone)
Limestone
Calcium Carbonate (primarily CaCO3 as Calcite or Aragonite)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Fe2O3 staining)
Fossilized Bone
Permineralized Bone (Vertebrate Fossil)
Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
Green Aventurine
Quartz (SiO2) with Fuchsite inclusions
Rhodolite Garnet
Mg3Al2(SiO4)3 - Fe3Al2(SiO4)3 (Pyrope-Almandine series)
Quartz Pebble (Water-worn)
Silicon Dioxide (SiO2)
Red Ochre (Hematite-rich Clay)
Limonitic/Hematitic Claystone (Fe2O3 with clay minerals)