Gneiss (likely)
Gneiss
Category
Browse anthropogenic (man made material mimicking sedimentary rock) specimens identified by the Rock Identifier community.
Gneiss (likely)
Gneiss
Rhodochrosite
Manganese carbonate (MnCO3)
Granite
Granite (Phaneritic Igneous Rock)
Granite Pebble
Igneous Intrusive Rock (Quartz-Feldspar-Mica Phenocrysts)
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
Brown Jasper (Likely)
Jasper (Cryptocrystalline Silicon Dioxide - SiO2)
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
Milky Quartz
Silicon Dioxide (SiO2)
Limestone (Flagstone)
Fossiliferous Limestone (CaCO3)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 inclusions)
Sandstone (with Limonite staining)
Arenite (FeOx-rich)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (likely Graywacke or Lithic Sandstone)
Arenite / Wacke (SiO2 based with lithic fragments)
Fossiliferous Limestone
Calcite (CaCO3) Rich Bio-sedimentary Rock
Sandstone
Arenite
Sandstone (Quartzose)
Arenite (primarily SiO2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Blue Kyanite
Kyanite (Al2SiO5)
Limonite (Iron Ore)
Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O)
Sandstone
Arenite (primarily SiO2 with trace Fe2O3)
Sandstone (Quartz-rich)
Arenite (SiO2 based)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Peridot (Olivine)
Olivine ((Mg, Fe)2SiO4)
Granite
Felsic Plutonic Rock (primarily SiO2)
Chert
Microcrystalline Quartz (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Limonite
Limonite (FeOO·nH2O)
Ferrosilicon Slag (Industrial Vitrified Glass)
Vitreous Silicate Residue
Fossiliferous Limestone
Limestone (CaCO3 - Calcium Carbonate)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3)
Green Calcite (Onyx Marble)
Calcium Carbonate (CaCO3)
Granite
Plutonic felsic igneous rock
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
Limestone (specifically Fossiliferous Limestone)
Calcium Carbonate (CaCO3)
Limestone with Bitumen/Chert
Calcite (CaCO3) containing organic hydrocarbons
Sandstone (Green/Yellow Siltstone variant)
Arenite or Siltstone (primarily SiO2 with mineral staining)
K2 Azurite Granite / K2 Stone
Granite (igneous rock) with Azurite inclusions (mineral)
Red Sandstone
Arenite (primarily Quartz and Feldspar with Iron Oxide cement)
Granite
Granite (Mainly Quartz SiO2, K-Feldspar KAlSi3O8, and Plagioclase)
Blue Slag Glass
Amorphous Silica (Industrial byproduct)
Jasper (specifically Yellow Jasper and Red Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions