Chert / Flint
Cryptocrystalline quartz (SiO2)
Category
Browse mineral (extraterrestrial) specimens identified by the Rock Identifier community.
Chert / Flint
Cryptocrystalline quartz (SiO2)
Garnet in Schist (Garnetiferous Micaceous Schist)
Almandine Garnet, Fe3Al2(SiO4)3
Galena in Quartz Matrix
Lead Sulfide (PbS) in Silicon Dioxide (SiO2)
Magnetite with Quartz
Magnetite (Fe3O4)
Greenschist
Chlorite schist
Fossilized Bone (Petrified Bone)
Permineralized Vertebrate Remains
Sandstone
Arenite
Quartz Vein in Sandstone
Hydrothermal Quartz (SiO2) in Arenite
Serpentine, likely a variety of Chrysoprase (green chalcedony) or a similar translucent green mineral.
Serpentine Group Minerals (e.g., Antigorite, Lizardite) or Chalcedony (SiO2) with nickel impurities for Chrysoprase green.
Schist
Schist (metamorphic rock)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Green Calcite
Calcium Carbonate (CaCO3)
Milky Quartz
Silicon Dioxide (SiO2)
Schist
Mica Schist
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite mica)
Diamond
Carbon (C)
Granite
Granite
Amethyst
Quartz variety; SiO2 (Silicon Dioxide)
Turquoise
Hydrated phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)
Granite Pebble (Salt and Pepper Granite)
Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Biotite/Amphibole)
Quartz (Milky/Yellowish Pebble)
Silicon Dioxide (SiO2)
Granite
Granite (composed of Quartz, Alkali Feldspar, and Plagioclase)
Eudialyte
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Granitic Pegmatite
Pegmatite
Sandstone
Arenite (primarily SiO2)
Diorite
Diorite (Intermediate intrusive igneous rock)
Vesicular Basalt with Amygdules
Amygdaloidal Basalt
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
Schorl (Black Tourmaline) in Quartz and Feldspar
NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
Magnetite (potentially Hematite-rich)
Magnetite (Fe3O4)
Shale
Fissile mudrock (composed primarily of clay minerals and quartz)
Granite
Granite (a plutonic igneous rock composed of quartz, feldspar, and mica)
Epithermal Gold Ore (in Quartz/Rhyolite matrix)
Auriferous Quartz (Au + SiO2)
Garnet
Pyrope or Almandine (X3Y2(SiO4)3)
Quartz Geode (Cracked)
Silicon Dioxide (SiO2)
Green Calcite
Calcium Carbonate (CaCO3)
Selenite (Satin Spar)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
Quartz Geode (with Calcite influence)
Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)
Bloodstone
Heliotrope (Chalcedony)
Gossan (with Limonite and Hematite)
Gossanous iron-oxide rock (Fe2O3 · nH2O)
Peacock Ore
Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with iridescent tarnish
Aventurine
Aventurine Quartz (SiO2)