Pyrite
Iron Sulfide (FeS2)
Category
Browse sedimentary (synthetic) specimens identified by the Rock Identifier community.
Pyrite
Iron Sulfide (FeS2)
Fluorite, Turquoise, and Calcite set
Calcium Fluoride (CaF2), Hydrous Phosphate of Copper and Aluminum (CuAl6(PO4)4(OH)8·4H2O), Calcium Carbonate (CaCO3)
Orange Calcite
Calcium Carbonate (CaCO3)
Quartz Geode
Silicon Dioxide (SiO2) in Host Rock
Jasper (Iron-rich)
Silicon Dioxide (SiO2) with Fe2O3 (Hematite) impurities
Red Jasper (Polished)
Jasper (Iron-rich Microcrystalline Quartz, SiO2)
Geode (Chert or Quartz Nodule)
Silicon Dioxide (SiO2)
Chert (Chert Nodule with Chalky Cortex)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Orange Calcite (Cleavage Rhomb)
Calcite (Calcium Carbonate, CaCO3)
Manganese Ore (Psilomelane/Pyrolusite)
Psilomelane ((Ba,H2O)2Mn5O10) and Pyrolusite (MnO2)
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Green Opal
Hydrated Silica (SiO2·nH2O)
Banded sandstone pebble
Lithic or quartz-rich sandstone; exact composition requires testing
Sandstone (Pebble)
Sandstone
Limestone
Calcium Carbonate (CaCO3)
Quartz Geode in Sedimentary Host Rock
Silicon Dioxide (SiO2) in Carbonate Matrix
Limonite with Trace Fossils
Hydrous Iron Oxide Mixture (FeO(OH)·nH2O)
Rounded quartz-rich sandstone cobble
Quartz arenite (sandstone), likely iron-stained
Chert / Flint
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Painted Garden Rock
Coated Siltstone or Mudstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Caribbean Calcite
Calcium Carbonate with Argonite (CaCO3)
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
Chert (Common Opal/Jasper transition)
Silicon Dioxide (SiO2)
Black Opal (Triplet)
Hydrated Silica (SiO2·nH2O)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Quartz Geode
Silicon Dioxide (SiO2) in Geode formation
Sandstone (Quartzite-rich Cobble)
Clastic sedimentary rock (primarily SiO2)
Red Jasper (or Banded Jasper)
Silicon Dioxide (SiO2 with Hematite impurities)
Limestone
Calcite (CaCO3)
Sandstone (Pebble)
Arenite
Sandstone Pebble
Arenite
Ferruginous Siltstone
Siltstone with Magnetite/Hematite bands
Common Opal / Chert
Hydrated silica (SiO2·nH2O) or Microcrystalline Quartz (SiO2)
Fossil Sponge / Horn Coral / Crinoid Stem
Phylum Porifera or Cnidaria fossilized in calcium carbonate / silica
Glauconitic Sandstone
Glauconitic Sandstone (Quartz with Glauconite)
Sandstone (likely Graywacke or Lithic Arenite)
Clastic sedimentary rock predominantly composed of silicate grains
Chert (Sedimentary Rock)
Silicon Dioxide (SiO2)
Sandstone (Ferruginous)
Arenite (SiO2 with Fe2O3/FeO(OH) cement)
Red Jasper (or Agate/Jasper mixture)
Silicon Dioxide (SiO2) with Iron Oxide inclusions