Biotite Mica in Quartz
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) in Quartz (SiO2)
Category
Browse metamorphic or sedimentary (with staining) specimens identified by the Rock Identifier community.
Biotite Mica in Quartz
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) in Quartz (SiO2)
Quartz Vein in Host Rock (Gneiss/Schist)
Silicon Dioxide (SiO2) within a metamorphic matrix
Lapis Lazuli
Lapis Lazuli (Rock containing Lazurite, Calcite, and Pyrite)
Biotite Schist (with Garnet and Pyrite)
K(Mg,Fe)3AlSi3O10(OH,F)2 (Biotite focus)
Rhodonite
Rhodonite (Mn2+SiO3)
Peach Moonstone
Potassium Aluminum Silicate, KAlSi3O8
Green Tourmaline
Elbaite (part of Tourmaline group), Na(Li1.5Al1.5)Al6Si6O18(BO3)3(OH)4
Red Garnet (Almandine-Pyrope series)
Garnet Group, Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Arsenopyrite
Arsenopyrite (FeAsS)
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
Peacock Ore
Bornite (Cu5FeS4)
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(F,OH)2
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Red Garnet (Pyrope or Almandine)
Magnesium aluminum silicate (Mg3Al2(SiO4)3) or Iron aluminum silicate (Fe3Al2(SiO4)3)
Sodalite
Na8(Al6Si6O24)Cl2
Iolite-bearing Gneiss (Cordierite)
Cordierite (Mg2Al4Si5O18) in Gneiss matrix
Chalcopyrite
Chalcopyrite (CuFeS2)
Smoky Quartz
Silicon Dioxide (SiO2)
Peach Moonstone
Orthoclase Feldspar (KAlSi3O8)
Peacock Ore
Bornite (Cu5FeS4)
Dragon Blood Jasper
Epidote with Pietersite or Red Jasper (Silicate mineral)
Hypersthene
Hypersthene (Enstatite variety), (Mg,Fe)SiO3
Rutilated Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2 with Epidote/Tourmaline inclusions
Epidote in Matrix (Dragon Stone variant)
Epidote with Quartz/Feldspar (Ca2(Al,Fe)3(SiO4)3(OH))
Amazonite
KAlSi3O8 (Potassium aluminum silicate - blue-green variety of Microcline)
Orthoclase Feldspar
Potassium Feldspar (KAlSi3O8)
Green Aventurine
Silicon dioxide with Fuscite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Amazonite
K(AlSi3O8)
Aventurine Quartz
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
Quartzite
Quartzite (SiO2)
Sapphirine in Magnesian Schist
Sapphirine: (Mg,Al)8(Al,Si)6O20
Serpentinite
Serpentinite (group of hydrous magnesium iron phyllosilicates)
Quartzite Pebble
Metamorphic Quartzite (SiO2)
Biotite (Black Mica)
Biotite [K(Mg,Fe)3(AlSi3O10)(F,OH)2]
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
Greenschist / Chloritaform Schist
Chlorite Schist (Group of Silicate Minerals)
Yellow Jade (Nephrite)
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)