Sandstone
Clastic sedimentary rock (primarily SiO2)
Category
Browse mineral and sedimentary specimens identified by the Rock Identifier community.
Sandstone
Clastic sedimentary rock (primarily SiO2)
Pyrite cluster (iron pyrite)
Pyrite, FeS₂
Shale
Sedimentary rock composed of clay minerals and quartz
Septarian Pebble
Septarian nodule / Concretion
Magnetite / Ironstone
Magnetite (Fe3O4)
Fluorite
Calcium Fluoride (CaF2)
Celestite
Celestine (SrSO4)
Hematite
Iron Oxide (Fe2O3)
Orange Calcite
Calcium Carbonate (CaCO3)
Fossilized Gastropod / Coral
Phylum Mollusca / Cnidaria (Silicified or Calcified)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Fluorite
Calcium Fluoride (CaF2)
Graphite
Graphite (Carbon, C)
Graphite
Carbon (C)
Limonite
FeO(OH)·n(H2O)
Limonite Geode / Ironstone Nodule
Hydrated Iron Oxide Hydroxide (FeO(OH)·nH2O)
Sandstone (lithic)
Lithic Wacke / Arenite
River Pebble (Siltstone / Fine-grained Sandstone)
Sedimentary Pebble (Siliclastic)
Sandstone with Mineral Veining or Crust
Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)
Clear Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz Mineral
Silicon Dioxide (SiO2)
Sandstone
Arenite (SiO2 based)
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
Sandstone
Clastic Sedimentary Rock
Shale
Shale (claystone/mudstone)
Pyrite
Iron Pyrite (FeS2)
Pyrite
Iron Sulfide (FeS2)
Shale with Iron Staining
Fissile Mudrock (Sedimentary Rock)
Sandstone Pebble
Sandstone (primarily SiO2)
Sandstone
Sedimentary rock composed mainly of quartz sand
Fossilized Fish (Lepidotes)
Lepidotes sp. (Order: Lepisosteiformes)
Weathered Sandstone Cobble
Arenite / Quartz Sandstone
Blue Calcite
Calcium Carbonate (CaCO3)
Fossil scallop shell
Scallop (family Pectinidae); shell composed chiefly of calcite and/or aragonite (CaCO₃)
River Rock / Stream Pebble
Fluvial Clast / Rounded Sedimentary Particle
Sandstone (Common Quartz Pebble/Rock)
Sedimentary rock / Quartz arenite
Sandstone
Arenite
Limonite / Goethite (Iron Ore Mineral nodule)
FeO(OH)·nH2O / FeO(OH)
Sandstone
Clastic Sedimentary Rock (composed mostly of SiO2)
Banded Calcite
CaCO3
Milky Quartz
Silicon Dioxide (SiO2)