Sandstone
Sedimentary Rock (Quartz Sandstone)
Category
Browse mineral on sedimentary rock specimens identified by the Rock Identifier community.
Sandstone
Sedimentary Rock (Quartz Sandstone)
Sandstone
Arenite (SiO2 primarily)
Quartz-veined Sedimentary Rock
Hydrothermally veined Clastic Sedimentary Rock (SiO2 veins in Matrix)
Sandstone
Arenite (SiO2 based)
Red Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
Rough amber-colored quartz or calcite fragment
Likely quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing
Calcite
Calcium Carbonate (CaCO3)
Sandstone (Quartz-rich)
Arenite (SiO2)
Sandstone (Weathered / Crushed)
Quartz Sandstone
Sandstone (Greywacke)
Arenite / Clastic Sedimentary Rock
Sandstone
Sandstone (clastic sedimentary rock)
Ferruginous Sandstone (River Pebble)
Clastic Sedimentary Rock (Iron-rich)
Sandstone (likely Arkose or Lithic)
Clastic sedimentary rock (primarily SiO2)
Sandstone (likely Greywacke or Lithic Sandstone)
Arenite / Wacke
Sandstone
Arenite (primarily SiO2)
Fossilized Bone
Permineralized Vertebrate Bone
Siltstone Pebble with Veining
Siltstone
Likely quartz-bearing rock fragment
Quartz (SiO₂), possibly with iron-oxide staining or other mineral inclusions
Travertine
Calcium Carbonate (CaCO3)
Sandstone
Sedimentary Rock (Quartz arenite)
Coarse Sandstone Pebble
Clastic Sedimentary Rock (Sandstone)
Sandstone with Secondary Mineral Encrustation
Arenite with Silica/Calcite deposits (SiO2 or CaCO3)
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Sandstone
Sandstone (composed predominantly of Quartz, SiO2)
River Pebble (Siltstone / Fine-grained Sandstone)
Sedimentary Pebble (Siliclastic)
Sandstone (lithic)
Lithic Wacke / Arenite
Smoky Quartz and Chalcedony Geode Fragment
Silicon Dioxide (SiO2)
Sandstone
Sandstone (Sedimentary rock composed of silicate grains)
Small quartz-rich mineral fragment
Quartz (SiO₂), possibly milky or chalcedonic quartz
Fish Fossil in Limestone
Lycoptera (likely) in Micritic Limestone
Agate
Silicon Dioxide (SiO2) - variety Chalcedony
Pebble (Likely Basalt or Siltstone)
Clastic sedimentary rock or mafic volcanic rock
Small weathered mineral/rock fragment
Indeterminate; possibly quartz-bearing feldspathic rock or calcite-rich specimen
Sandstone
Arenite (SiO2 based typically)
Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO2)
Sandstone
Arenite (SiO2 principal)
Sandstone
Arenite (Clastic Sedimentary Rock)
Sandstone
Clastic sedimentary rock (Arenite)
Sandstone
Sedimentary Rock (Quartz arenite)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock - Arenite
Shale
Lutaceous Rock (Sedimentary Mudrock)
Limonite Concretion
Limonite (FeO(OH)·nH2O) Pseudomorph