Pyrite
Iron Pyrite (FeS2)
mineral
Category
Mineral Group
Browse mineral group specimens identified by the Rock Identifier community.
Moonstone (Feldspar)
Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)
mineral
Pink Granite
Phaneritic Felsic Igneous Rock
igneous
Greenschist (Greenstone)
Chlorite schist (primarily Chlorite-Epidote-Actinolite-Albite)
metamorphic
Granite / Gneiss Complex
Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)
igneous/metamorphic
Rutilated Quartz
Silicon Dioxide with Titanium Dioxide (SiO2 with TiO2 inclusions)
mineral
Basalt
Basalt (extrusive igneous rock)
Igneous
Peach Aventurine
Quartz variety (SiO2 + Hematite/Goethite inclusions)
mineral
Schist
Mica Schist
metamorphic
Granite
Granite (silica-rich intrusive igneous rock)
igneous
Magnetite with Pyrite or Chalcopyrite inclusions
Magnetite (Fe3O4) with Pyrite (FeS2)
mineral
Chalcedony or Chert/Jasper with secondary mineral staining
SiO2 (for chalcedony/quartz) with possible secondary copper minerals (e.g., CuSiO3·nH2O for chrysocolla, Cu2(CO3)(OH)2 for malachite) or iron oxides/hydroxides.
Mineral, potentially a rock with chalcedony/jasper.
Milky Quartz (Water-Worn Pebble)
Silicon Dioxide (SiO2)
mineral
Greenschist
Greenschist (Chlorite Schist)
metamorphic
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
igneous
Granite
Granite (compositional mixture of Quartz, Feldspar, and Mica)
igneous
Clear/White Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Garnetiferous Pegmatite
Pegmatite with Almandine Garnet and Muscovite
igneous
Green Aventurine
SiO2 (Silicon Dioxide with inclusions of Fuchsite mica)
mineral
Diamond (set in Gold)
Carbon (C)
mineral
Granitic Gneiss
Gneiss (containing Potassium Feldspar and Quartz)
metamorphic
Granite
Intrusive igneous felsic rock
igneous
Diamond (in Jewelry Setting)
Carbon (C) - Isometric-Hexoctahedral
mineral
Banded Gneiss with Quartz Vein
Foliated Metamorphic Rock (Gneiss)
metamorphic
Granite Cobble
Felsic Intrusive Igneous Rock (Granite)
igneous
Smoky Quartz on Feldspar (Granite Pegmatite)
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)
igneous
Granite
Granite (comprised primarily of Quartz (SiO2), Feldspar (KAlSi3O8), and Mica (KAl2(AlSi3O10)(OH)2))
igneous
Diamond (or Lab-Grown Cubic Zirconia)
Carbon (C)
mineral
Milky Quartz with inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Granite
Phaneritic plutonic rock (Felsic)
igneous
Quartz (Iron-Stained or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Sandstone (River Cobble)
Clastic Sedimentary Rock (primarily Quartz with Feldspar)
sedimentary
Sandstone Beach Pebble
Clastic sedimentary rock (SiO2 with iron oxide cement)
sedimentary
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing mica)
mineral
Magnetic Hematite
Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)
Mineral
Granite
Phaneritic plutonic rock (Quartz, Alkali Feldspar, and Plagioclase)
igneous
Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Granite
Granite
Igneous
Sedimentary rock with quartz veining
Laminated siltstone or mudstone with hydrothermal quartz veins
sedimentary
Megalodon Shark Tooth Fossil
Otodus megalodon
sedimentary
Granite
Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase)
igneous