Pyrite
Iron Pyrite (FeS2)
mineral
Category
Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)
Browse industrial byproduct (often confused with igneous rocks or meteorites) specimens identified by the Rock Identifier community.
Learn about Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites) in the encyclopedia
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Chert (Flint)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Quartz
Silicon Dioxide (SiO2)
Mineral
Gneiss (specifically Amphibolite Gneiss)
Gneiss
metamorphic
Biotite Mica in Host Rock
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Quartz (Chert/Chalcedony Variety)
Silicon Dioxide (SiO2)
mineral
Gneiss
Metamorphic Gneiss
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Basalt Pebble
Extrusive Igneous Rock
igneous
Granitoid (Commonly Granite)
Phaneritic Felsic Igneous Rock
igneous
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Iron, or Manganese
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Aquamarine (Rough)
Beryl (Be3Al2Si6O18)
mineral
Mica Schist
Mica Schist (primarily Muscovite or Biotite)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Garnet-bearing Schist
Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist
metamorphic
Fluorite
Calcium Fluoride (CaF2)
mineral
Almandine Garnet
Almandine - Fe3Al2(SiO4)3
mineral
Quartz (likely a form of massive or vein quartz)
Quartz (SiO₂)
Mineral
Quartzite
Metamorphic Quartz Sandstone
metamorphic
Granite
Granite (Phaneritic Quartz-Feldspar Rock)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
Mineral
Sandstone Chert/Quartzite
Silicon Dioxide (SiO2) - Sedimentary Sandstone / Orthoquartzite
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Dyed Magnesite (often sold as Red Turquoise or Howlite)
Magnesium Carbonate (MgCO3)
mineral
Quartz pebble / Quartzite
Silicon Dioxide (SiO2)
sedimentary
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Biotite Mica Schist
Metamorphic Rock containing Biotite K(Mg,Fe)3AlSi3O10(OH)2
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone or Mudstone with Iron Staining
Ferruginous Sandstone/Mudstone
Sedimentary
Banded Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss (specifically a Granitic Gneiss)
Gneiss (typically composed of Quartz, Feldspar, and Mica/Amphiboles)
metamorphic
Muscovite Mica
Muscovite (Potassium Aluminum Silicate Hydroxide), KAl2(AlSi3O10)(OH)2
mineral
Sulemani Hakik (Eye Agate)
Chalcedony (SiO2)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Iron inclusions
sedimentary