Igneous, Sedimentary, Metamorphic, And Mineral

Browse igneous, sedimentary, metamorphic, and mineral specimens identified by the Rock Identifier community.

Fluorite, Turquoise, and Calcite set

Calcium Fluoride (CaF2), Hydrous Phosphate of Copper and Aluminum (CuAl6(PO4)4(OH)8·4H2O), Calcium Carbonate (CaCO3)

mineral

Ferruginous Quartz

Quartz (Silicon Dioxide) - SiO2 with Iron Oxide inclusions

mineral

Yellow Aventurine (specifically a carved crescent moon)

Silicon Dioxide (SiO2) with inclusions

mineral

Biotite (Mica)

Biotite - K(Mg,Fe)3AlSi3O10(F,OH)2

mineral

Muscovite Mica

Muscovite - KAl2(AlSi3O10)(OH)2

mineral

Citrine

Silicon dioxide (SiO2)

mineral

Mica

Phyllosilicate (group name), typically Muscovite KAl2(AlSi3O10)(OH)2 or Biotite K(Mg,Fe)3(AlSi3O10)(OH)2

mineral

Sodalite

Na8(Al6Si6O24)Cl2

mineral

Milky Quartz

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

Morganite (Pink Beryl)

Beryllium aluminum silicate Be3Al2(SiO3)6

mineral

Sodalite

Sodalite [Na8(Al6Si6O24)Cl2]

mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral

Red Garnet (Pyrope or Almandine)

Garnet Group (A3B2(SiO4)3)

mineral

Garnet (Pyrope-Almandine series)

Garnet Group, (Mg,Fe)3Al2Si3O12

mineral

Smoky Quartz

Silicon Dioxide (SiO2)

mineral

Epidote (likely Unakite component or Epidosite)

Epidote (Ca2(Al2Fe)(SiO4)(Si2O7)O(OH))

metamorphic

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Mineral

Quartz

Quartz (SiO₂)

mineral

Green Quartz (Prasiolite/Adventurine)

Silicon Dioxide with inclusions (SiO2)

mineral

Pyrite

Iron Disulfide (FeS2)

mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

mineral

Amethyst (Purple), Sulfur (Yellow), and Blue Apatite

SiO2 (Quartz), S (Native Sulfur), Ca5(PO4)3(F,Cl,OH) (Apatite Group)

mineral

Quartz (likely a clear or rock crystal variety)

Quartz (SiO2 - Silicon Dioxide)

Mineral

Pink Feldspar (Orthoclase)

Orthoclase Feldspar (KAlSi3O8)

mineral

Rose Quartz

Silicon Dioxide with trace inclusions of dumortierite or titanium (SiO2)

mineral

Pyrite

Iron Disulfide (FeS2)

mineral

Biotite Schist

Biotite-rich Schist

metamorphic

Black Spinel

Magnesium Aluminum Oxide (MgAl2O4)

mineral

Galena

Lead(II) sulfide (PbS)

mineral

Crystal Quartz Beads (likely Clear Quartz)

Quartz (SiO₂)

Mineral

Greenstone / Greenschist

Chlorite schist / Epidiorite

metamorphic

Garnet (likely Almandine, Pyrope, or a blend)

Garnet group minerals: X3Y2(SiO4)3, where X and Y represent various metal ions (e.g., Almandine: Fe3Al2(SiO4)3, Pyrope: Mg3Al2(SiO4)3)

Mineral

Magnetite

Magnetite (Fe3O4)

Mineral

Quartz (Milky Quartz/Citrine Type)

Silicon Dioxide (SiO2)

mineral

Yellow Quartz (Citrine/Yellow Jasper mix)

Silicon Dioxide (SiO2)

mineral

Clear Quartz (Rock Crystal)

Quartz (SiO₂)

Mineral

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(F,OH)2)

mineral

Rough Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

mineral

Cloud Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

mineral