Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
Category
Browse mineral (refined metal) specimens identified by the Rock Identifier community.
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
Schist
Mica Schist (primarily Muscovite and Quartz)
Mica Schist
Mica Schist (primarily Muscovite and Biotite)
Schist with Garnet inclusions
Garnet-mica-schist
Baryte (Barite)
Barium sulfate (BaSO4)
Gossan (with Limonite and Hematite)
Goethite (FeO(OH)), Limonite (FeO(OH)·nH2O), and Hematite (Fe2O3)
Schist
Mica Schist
Mica Schist
Muscovite/Biotite Schist
Galena
Galena (lead sulfide, PbS)
Peacock Ore
Bornite (Cu5FeS4)
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2
Marcasite on Agate / Sphalerite-Pyrite Agate Geode Slice
Marcasite (FeS2) / Pyrite on Quartz (SiO2)
Brown chalcedony (likely carnelian/iron-stained quartz)
Microcrystalline quartz, SiO₂; brown coloration from iron oxides/hydroxides
Gold Nugget
Native Gold (Au)
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
Gold-Bearing Quartz
Auriferous Quartz (SiO2 with native Au)
Labradorite
Labradorite (Plagioclase Feldspar Series) - (Ca, Na)(Al, Si)4O8
Pink Fluorite
Fluorite (Calcium Fluoride) - CaF2
Green Aventurine
Quartz variety (SiO2 with inclusions)
Labradorite
Labradorite ((Ca,Na)(Al,Si)4O8)
Amazonite
K(AlSi3O8), Microcline (potassium feldspar)
Ferruginous Quartz (Hematoid Quartz)
Silicon Dioxide (SiO2) with Hematite or Goethite inclusions
Labradorite
Feldspar (Plagioclase Series), (Ca,Na)(Al,Si)4O8
Basalt
Basalt
Basalt
Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
Iron-rich vesicular rock, possibly slag or weathered basalt
Identification uncertain; likely ferruginous basalt/ironstone, with possible anthropogenic iron slag
Purpurite
Manganese Iron Phosphate, Mn3+(PO4)
Weathered Pyrite Nodule
Iron Sulfide (FeS2) undergoing oxidation to limonite/goethite
Purpurite
Manganese Iron Phosphate, Mn3+(PO4)
Limonite
FeO(OH)·n(H2O)
Gold Nugget / Placer Gold
Native Gold (Au)
Green Aventurine
Quartz with Fuchsite inclusions (SiO2)
Muscovite Mica (in Quartz/Feldspar Matrix)
Muscovite - KAl2(AlSi3O10)(OH)2
Gold Nugget
Native Gold (Au)
Hypersthene
Hypersthene (formula: (Mg,Fe)SiO3)
Hematite (beads)
Hematite (Fe₂O₃)
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
Magnetite (potentially as a Lodestone or within Ironstone)
Magnetite (Fe3O4)
Rutilated Quartz
Quartz (SiO2) with Rutile Inclusions (TiO2)
Schorl (Black Tourmaline)
NaFe3Al6(BO3)3Si6O18(OH)4 (Complex Borosilicate)