Red Sandstone
Sedimentary Quartz Arenite / Arkose
Category
Browse mineral on sedimentary rock specimens identified by the Rock Identifier community.
Red Sandstone
Sedimentary Quartz Arenite / Arkose
River Stones (Quartzite and Sandstone)
Quartzite / Sedimentary Rock (SiO2 dominant)
Amethyst Geode
Quartz (Silicon Dioxide, SiO2) with iron impurities
Granular Sandstone
Arenite (variable composition, primarily SiO2)
Sandstone or Siltstone
Arenite (if sandstone)
Fossiliferous Sandstone
Sedimentary rock containing invertebrate fossils
Banded Gneiss
Gneiss (Foliated Metamorphic Rock)
Quartz-veined Mudstone or Argillite
SiO2 (Quartz) in Siltstone/Mudstone matrix
Agate Geode
Silicon Dioxide (SiO2)
Quartz geode or quartz-bearing rock
Quartz (SiO₂), likely in a chalcedony- or basalt-hosted cavity
Veined Limestone (Micrite) with Quartz/Calcite Veins
Calcium Carbonate (CaCO3) with Silicate or Carbonate inclusions
Sandstone
Arenite (clastic sedimentary rock)
Breccia
Breccia - Clastic sedimentary rock
Sandstone (likely Arkosic)
Clastic Sedimentary Rock (Sandstone)
Sandstone (likely Conglomerate or Gritstone)
Arenite (SiO2 based)
Limestone
Calcareous sedimentary rock (CaCO3)
Sandstone
Sedimentary Clastic Rock (Quartzose Sandstone)
Quartz Pebble
Silicon dioxide (SiO2)
Pyrite (likely)
Pyrite, FeS₂
Sandstone
Arenite
Sandstone with Iron-Stained Band
Quartz Arenite / Sedimentary Rock
Sandstone (Glacial Cobble)
Arenite / Sedimentary Rock (primarily SiO2)
Grey Pebble (Sandstone / Quartzite Pebble)
Sedimentary rock (primarily Quartz - SiO2)
Sandstone Pebble
Quartz Sandstone
Zebra Jasper
Silicified sedimentary rock (SiO2) with mineral inclusions
Sandstone
Arenite (primarily SiO2)
Druzy Quartz on Chert/Siltstone
Silicon Dioxide (SiO2) on Microcrystalline Silica/Siltstone matrix
Fluorite with Quartz coating
Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)
Tumbled Agate
Silicon Dioxide (Chalcedony variety), SiO2
Sandstone (with Limonite staining)
Arenite (primarily SiO2 with FeO(OH)·nH2O)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Geode (Unopened)
Silica-rich Concretion (SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Geode (Unopened)
Crystalline Quartz or Chalcedony filled Geode (SiO2)
Banded Sandstone (River Pebble)
Clastic Sedimentary Rock (SiO2 with impurities)
Quartz on Matrix
Silicon Dioxide (SiO2)
Sandstone
Arenite
Conglomerate
Lithified, poorly sorted gravel; composition is uncertain from the image
Bivalve Fossil (Clam)
Class Bivalvia (e.g., Exogyra or Gryphaea species)
Satin Spar Selenite
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
Satin Spar (Selenite)
Gypsum (CaSO4·2H2O)
Sandstone
Arenite (SiO2 based)