Amazonite
Microcline (KAlSi3O8) with Pb impurities
mineral
Category
Mineral Precipitate (Anthropogenic Context)
Browse mineral precipitate (anthropogenic context) specimens identified by the Rock Identifier community.
Citrine
Silicon dioxide (SiO2)
mineral
Amethyst
Quartz (Silicon Dioxide with Iron impurities), SiO2
mineral
Amazonite
KAlSi3O8 (Potassium aluminum silicate - blue-green variety of Microcline)
mineral
Fire Opal (in Matrix)
Hydrated Silica (SiO2·nH2O)
mineral
Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Amazonite
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Chalcedony (Agate Pebble)
Silicon Dioxide (SiO2)
mineral
Schist/Phyllite
Metamorphic Schist (Chlorite Schist variety)
metamorphic
Limonite (Ochreous)
FeO(OH)·nH2O (Hydrated Iron Oxide)
mineral
Carnelian (Agate)
SiO2 (Silicon Dioxide with Iron Oxide impurities)
mineral
Granite
Granite (Phaneritic Acidic Igneous Rock)
igneous
Arsenopyrite
Arsenopyrite (FeAsS)
mineral
Green Apophyllite
Fluorapophyllite-(K), KCa4(Si8O20)(F,OH)·8H2O
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt containing Zeolite or Quartz (SiO2/Silicates)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz in Host Rock
Silicon Dioxide (SiO2) in Rhyolite or Granite matrix
igneous
Lazulite
Lazulite (Mg,Fe2+)Al2(PO4)2(OH)2
mineral
Banded Calcite (Tumbled)
Calcium Carbonate (CaCO3)
Mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Fossil Coral
Fossilized Scleractinia or Tabulata (various genera/species)
Sedimentary
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
sedimentary
Red Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Turquoise (Blue Howlite / Magnesite imitation)
CuAl6(PO4)4(OH)8·4H2O (for natural Turquoise); Ca2B5SiO9(OH)5 (for Howlite)
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 oxides)
sedimentary
Red Sandstone
Arenite (with Iron Oxide)
sedimentary
Sandstone (Red Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)
sedimentary
N/A - Image is non-geological
Acrylonitrile Butadiene Styrene (ABS) or Polypropylene (PP)
Synthetic material (Plastic/Polymer)
Quartzite and Jasper Pebbles
Quartzite (re-crystallized Quartz) and Cryptocrystalline Quartz (SiO2)
metamorphic
Pyrite (Iron Pyrite)
Iron Sulfide (FeS2)
mineral
Bornite
Bornite (Cu5FeS4)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Epidote
Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)
Mineral
Rough Quartz (Milky Quartz Pebbles)
Silicon Dioxide (SiO2)
mineral
Sandstone (with potential iron-oxide staining)
Arenite (primarily SiO2)
sedimentary
Shungite
Shungite (carbon-rich Precambrian rock)
mineral
Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Portable Ceramic Space Heater
Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements
not a rock (synthetic/industrial object)
Dinosaur Fossil (Tyrannosaurus rex skull replica/specimen)
Tyrannosaurus rex (fossilized in permineralized sedimentary matrix)
sedimentary