Banded gneiss pebble
Gneiss, commonly quartz–feldspar–mica gneiss
Category
Browse mineral (metamorphic pseudomorph) specimens identified by the Rock Identifier community.
Banded gneiss pebble
Gneiss, commonly quartz–feldspar–mica gneiss
Greenschist
Greenschist (composed of Chlorite, Actinolite, and Epidote)
Blue Quartzite
Quartzite (silicon dioxide, SiO2)
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)
Turquoise and Hematite
CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Fe2O3 (Hematite)
Greenschist
Greenschist (containing Chlorite, Actinolite, and Epidote)
Quartzite pebble with Quartz and Mica
Metamorphic Quartzite (SiO2 with accessory minerals)
Granitic Gneiss
Gneiss (Metamorphic Rock)
Green Schist
Greenschist (Chlorite Schist)
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2
Chlorite (Small Flakes/Sand)
Chlorite Group (Magnesium Iron Aluminum Silicate Hydroxide - (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)
Small white mineral fragment
Indeterminate; possibly quartz, calcite, or feldspar
Magnetite
Iron(II,III) oxide (Fe3O4)
Rhodochrosite
Manganese Carbonate (MnCO3)
Pyrite
Iron Disulfide (FeS2)
Chalcopyrite
CuFeS2
Golden Calcite
Calcium Carbonate (CaCO3)
Blue Calcite
Calcium Carbonate (CaCO3)
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
Honey Calcite
Calcium Carbonate (CaCO3)
Magnetite (Iron Ore)
Magnetite (Fe3O4)
Bornite
Bornite (Cu5FeS4)
Magnetite / Ironstone Pebble
Magnetite (Fe3O4)
Magnetite (potentially Hematite)
Magnetite (Fe₃O₄)
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
Moonstone (Tumbled)
Potassium Aluminum Silicate (KAlSi3O8) with inclusions of Albite
Blue Calcite
Calcium Carbonate (CaCO3)
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
Bornite
Bornite (Cu5FeS4)
Quartz (Small Pebble)
Silicon Dioxide (SiO2)
Blue Quartz (Dumortierite Quartz)
Silicon Dioxide with Aluminum Borosilicate (SiO2 + AlAl6BSi3O18)
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
Orange Calcite
Calcium Carbonate (CaCO3)
Peacock Ore
Bornite (Cu5FeS4) or iridescent Chalcopyrite (CuFeS2)
Quartz with Iron Stains
Silicon Dioxide (SiO2) with FeOx inclusions
Pyrite
Iron Pyrite (FeS₂)
Green Aventurine
Quartz (Aventurine variety) - SiO₂ with Fuchsite inclusions
Quartz (Common or Milky Quartz)
Silicon Dioxide (SiO2)
Schist
Schist (Crystalline metamorphic rock)
Garnet in Quartz Matrix
Almandine Garnet (Fe3Al2(SiO4)3) in Quartz (SiO2)
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)