Pyrite (Fool's Gold)
Iron Sulfide (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.
Greenstone
Greenschist (metamorphosed mafic igneous rock)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Pyrite (Iron Pyrites)
Iron Sulfide (FeS2)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - variety Carnelian (Chalcedony)
Mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Granite Gneiss
Gneiss (High-grade regional metamorphic rock)
Metamorphic
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Blue Calcite (commonly sold as Caribbean Calcite)
Calcium Carbonate (CaCO3)
mineral
Gneiss
Gneiss
metamorphic
Gneiss (Metamorphic Rock)
Gneiss
metamorphic
Orange Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneissic Metamorphic Rock
metamorphic
Citrine
Silicon Dioxide (SiO2) with ferric iron impurities
mineral
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Dragon Vein Agate
Chalcedony (cryptocrystalline silica, SiO2) variety Agate
mineral
Garnet (likely Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Black Tourmaline (Schorl)
Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3(OH)4)
Mineral
Sodalite
Sodalite: Na8(Al6Si6O24)Cl2
igneous
Dark-colored Igneous Rock (likely Basalt or Diabase)
Basalt (extrusive igneous) or Diabase (intrusive igneous)
Igneous Rock
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Greenstone / Glauconitic Siltstone
Metabasalt or Glauconite-rich Sedimentary Rock
metamorphic or sedimentary
Rose Quartz
Silicon Dioxide with traces of titanium, iron, or manganese (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite (on Shale/Matrix)
Iron Disulfide (FeS2)
mineral
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral
Aventurine (Green Quartz)
Silicon Dioxide (SiO2) with inclusions of Fuchsite (Mica)
mineral
Quartz / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral, often found as detrital grains in sedimentary rocks
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite River Cobble
Quartzite (primarily SiO2)
metamorphic
Scoria (Lava Rock)
Scoria
igneous
Quartz (likely Milky Quartz or Chalcedony)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Emerald in Matrix
Emerald (Beryllium Aluminum Silicate), Be3Al2(SiO3)6
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral