Muscovite Mica (in Quartz matrix)
Potassium aluminum silicate hydroxide fluoride (KAl2(AlSi3O10)(F,OH)2)
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Browse mineral (refined metal) specimens identified by the Rock Identifier community.
Muscovite Mica (in Quartz matrix)
Potassium aluminum silicate hydroxide fluoride (KAl2(AlSi3O10)(F,OH)2)
Black Tourmaline (Schorl)
Sodium Iron Aluminum Borosilicate (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
Schorl (Black Tourmaline)
Sodium Iron Aluminum Borosilicate Hydroxide; NaFe2+3Al6Si6O18(BO3)3(OH)3OH
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
Arfvedsonite
Arfvedsonite [Na3(Fe2+)4Fe3+Si8O22(OH)2]
Gold Nugget
Native Gold (Au)
Peacock Ore
Bornite (Cu5FeS4)
Sunstone
Oligoclase (Plagioclase Feldspar) - (Ca, Na)(Al, Si)4O8
Tahitian Black Pearl
Biogenic Calcium Carbonate (Aragonite/Conchiolin Mixture), CaCO3
Magnetite / Iron-Rich Concretion
Magnetite (Fe3O4) or Bog Iron Limonite
Magnetite / Iron Ore
Magnetite (Fe3O4)
Amethyst with Marcasite accents
Amethyst (Silicon Dioxide SiO2) and Marcasite (Iron Sulfide FeS2)
Black Tourmaline (Schorl)
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)
Gold Nugget
Native Gold (Au)
Pyrite
Iron Disulfide (FeS2)
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
Limonite (Iron Ore)
FeO(OH)·nH2O
Arsenopyrite
Arsenopyrite (FeAsS)
Gold Nugget
Native Gold (Au)
Green Aventurine
Quartz variant (SiO2) with Fuchsite inclusions
Galena
Lead(II) Sulfide (PbS)
Sandstone with Manganese Dendrites/Oxide coatings
Arenite with Pyrolusite and Romanechite (MnO2)
Schist
Mica Schist
Black Sand (Magnetite/Heavy Mineral Concentrate)
Magnetite-rich Placers (Fe3O4)
Pyrite Cubes in Matrix
Iron Disulfide (FeS2) in Host Matrix
Green Aventurine
Silicon Dioxide with Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
Dark volcanic rock, likely basalt
Basalt; fine-grained mafic silicate rock dominated by plagioclase and pyroxene, commonly with olivine
Green Fluorite
Calcium Fluoride (CaF2)
Fluorite
Calcium Fluoride (CaF2)
Fluorite
Calcium Fluoride (CaF2)
Fluorite
Calcium Fluoride (CaF2)
Fluorite
Calcium Fluoride (CaF2)
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
Fluorite (likely Fluorite on Quartz/Matrix)
Calcium Fluoride (CaF2)
Sunstone
Oligoclase or Andesine (Labradorite) Feldspar (Na,Ca)(Si,Al)4O8
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
Fluorite
Calcium Fluoride (CaF2)