Sandstone Pebble
Sedimentary Clastic Rock (Quartz Arenite)
Category
Browse sedimentary or igneous fragment specimens identified by the Rock Identifier community.
Sandstone Pebble
Sedimentary Clastic Rock (Quartz Arenite)
Chert (Flint variety)
Chert (SiO2)
Breccia
Clastic Breccia (SiO2/CaCO3 dominated)
Greywacke (River Slikenside)
Greywacke (Lithic Sandstone)
Fossiliferous Limestone / Petrifaction
Sedimentary rock with fossil inclusions / Calcium Carbonate (CaCO3)
Sandstone (with Iron Oxide)
Quartz Arenite / Ferruginous Sandstone (SiO2 with Fe2O3)
Conglomerate
Conglomerate (clastic sedimentary rock)
Sandstone (Weathered Cobble)
Clastic Sedimentary Rock (primarily SiO2)
Conglomerate
Conglomerate (clastic sedimentary rock)
Unidentified coarse-grained rock fragments
Likely granite or granitic rock; exact identification is uncertain from the photograph
Sandstone (Ferruginous)
Arenite (complex silicate composition with iron oxides)
Sandstone
Arenite (SiO2 based)
Sandstone
Clastic Sedimentary Rock
Quartz
SiO₂ (Silicon Dioxide)
Sandstone Pebble
Sedimentary Clastic Rock (Quartz Arenite)
Sandstone with Iron Oxide Staining
Arenite with Limonite/Hematite alteration
Sandstone (likely Graywacke or Arkose variant)
Clastic Sedimentary Rock (Lithic Sandstone)
Fossiliferous Limestone Pebble
Biogenic Sedimentary Rock (CaCO3)
Sandstone Pebble
Sandstone (Siliciclastic Sedimentary Rock)
River Pebble (Sandstone)
Clastic Sedimentary Rock (Sandstone)
Sandstone (Greywacke)
Arenite / Clastic Sedimentary Rock
Fossiliferous Limestone
Fossiliferous Limestone (Sedimentary Rock)
Granite
Granite (Phaneritic Igneous Rock)
Mica Schist with Quartz and Muscovite
Muscovite-Quartz Schist
Weathered limestone or calcitic fossil/reef fragment
Calcite-rich limestone (CaCO₃), possibly fossiliferous limestone
Chert (specifically a weathered Chert nodule or fragment)
Chert; Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (specifically Flint or Common Opal fragment)
Cryptocrystalline Silica (SiO2)
Carnelian Agate
Chalcedony (SiO2) with iron oxide inclusions
Banded Sandstone
Arenite (Sandstone with iron oxide banding)
Sandstone (likely Arkosic or Lithic)
Clastic Sedimentary Rock (composed predominantly of sand-sized grains, 0.0625 to 2 mm)
Limestone with Calcite Veining
Calcium Carbonate (CaCO3)
Sandstone
Arenite (SiO2 based with mineral cement)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Weathered limestone
Calcite-rich limestone (CaCO₃), possibly fossiliferous
Beach Pebble (Quartzite / Sandstone)
Quartz-rich sedimentary or metamorphic rock pebble
Jasper and Quartz Breccia
Silicified Breccia (SiO2)
Limestone with Quartz/Calcite Veins
Sedimentary Limestone (CaCO3 with SiO2 or CaCO3 intrusions)
Sandstone (Greywacke)
Sandstone (SiO2 enriched with lithic fragments)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Vuggy Limestone
Carbonate Sedimentary Rock with Vuggy Porosity (CaCO3)
Breciated Chert
Silicon Dioxide (SiO2) with Clastic Structure
Fossilized Oyster (Gryphaea or Exogyra)
Crassostrea / Gryphaea (Bivalvia)