Biotite Mica
Biotite, K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Category
Igneous, Sedimentary, Metamorphic
Browse igneous, sedimentary, metamorphic specimens identified by the Rock Identifier community.
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Shale or Argillite
Shale (sedimentary) / Argillite (metamorphic)
Sedimentary or Metamorphic (low-grade)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Quartz
Quartz (SiO₂)
Mineral
Hematite
Hematite (Fe2O3)
mineral
Quartz Veined Mudstone
Metasedimentary rock with Quartz (SiO2) veins
metamorphic
Greenschist
Greenschist (Chlorite Schist)
metamorphic
Mica Schist
Mica Schist (Quartz-Mica Metamorphic Rock)
metamorphic
Mica-rich Pegmatite
Pegmatite (rich in Muscovite and Biotite)
igneous
Kyanite
Kyanite (Al2SiO5)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite / Apatite Group (Ca5(PO4)3(F,Cl,OH))
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Iron-stained Quartz
Silicon Dioxide with Iron Oxide (SiO2 with Fe2O3)
mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(F,OH)2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Black Tourmaline (Schorl)
NaFe3+3Al6(BO3)3Si6O18(OH)4
mineral
Corundum (Sapphire / Raw Sapphire)
Aluminum Oxide (Al2O3)
gemstone
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Sapphire (Blue/Violet Rough)
Corundum (Al2O3)
gemstone
Unakite
Altered Granite (Epidotized Granite)
metamorphic
Quartz (Milky / Clear Quartz Fragment)
Silicon Dioxide (SiO2)
mineral
Potassium Feldspar (Orthoclase / Microcline)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Blue Apatite
Fluorapatite / Apatite (Ca5(PO4)3(F,Cl,OH))
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Quartz (Iron-Stained Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with ferric iron impurities
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Blue Quartz (Dumortierite Quartz)
SiO2 with inclusion of AlAl6BSi3O18
mineral
Chalcopyrite (Peacock Ore)
Chalcopyrite (CuFeS2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon dioxide (SiO2)
mineral
Labradorite
Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8
mineral
Schorl (Black Tourmaline)
NaFe3Al6(BO3)3Si6O18(OH)4 (Sodium Iron Aluminum Borosilicate)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral