Rock Identifier

Category

Mineral

Browse mineral specimens identified by the Rock Identifier community.

Learn about Mineral in the encyclopedia

Acanthite

Adirondack Garnet

Adirondack Garnet

Adularia

Agate

Albite

Alkali Feldspar

Alkali Feldspar

Amazonite

Anatase

Andalusite

Angelite

Anglesite

Anhydrite

Epidote (Epidote (Ca2(Al,Fe)3(SiO4)3(OH))) — mineral

Epidote

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

Pegmatitic granite specimen (Granitic pegmatite, chiefly quartz (SiO₂), feldspar, and mica) — igneous

Pegmatitic granite specimen

Granitic pegmatite, chiefly quartz (SiO₂), feldspar, and mica

Gneiss (likely biotite–quartz–feldspar gneiss) (Foliated gneiss; primarily quartz (SiO₂), feldspar, and biotite mica) — metamorphic

Gneiss (likely biotite–quartz–feldspar gneiss)

Foliated gneiss; primarily quartz (SiO₂), feldspar, and biotite mica

Hag Stone (Perforated sedimentary rock (typically sandstone or limestone)) — sedimentary

Hag Stone

Perforated sedimentary rock (typically sandstone or limestone)

Granite (Intrusive igneous rock) — igneous

Granite

Intrusive igneous rock

Fossil / Permineralized Bone (Tyrannosaurus rex fossil (Hydroxylapatite replaced by various minerals)) — sedimentary

Fossil / Permineralized Bone

Tyrannosaurus rex fossil (Hydroxylapatite replaced by various minerals)

Weathered geode or vug-bearing rock (Likely a quartz- or calcite-lined geode/vug in a host rock; exact minerals cannot be confirmed from the image) — mineral

Weathered geode or vug-bearing rock

Likely a quartz- or calcite-lined geode/vug in a host rock; exact minerals cannot be confirmed from the image

Limonite or Goethite (Ironstone) (Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)) — mineral

Limonite or Goethite (Ironstone)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Kaolinite (China Clay) (Kaolinite (Al2Si2O5(OH)4)) — sedimentary

Kaolinite (China Clay)

Kaolinite (Al2Si2O5(OH)4)

Turquoise (CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminum)) — mineral

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminum)

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Chrysocolla (Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla

Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O

Malachite (Copper carbonate hydroxide [Cu2CO3(OH)2]) — mineral

Malachite

Copper carbonate hydroxide [Cu2CO3(OH)2]

Limonite Ironstone (Goethite-Limonite concretion / Iron oxide) — sedimentary

Limonite Ironstone

Goethite-Limonite concretion / Iron oxide

Pebble with vesicles, likely basalt (Vesicular basalt; chiefly plagioclase, pyroxene, and iron-magnesium minerals) — igneous

Pebble with vesicles, likely basalt

Vesicular basalt; chiefly plagioclase, pyroxene, and iron-magnesium minerals

Chakra Crystal Bracelet (Mixed Mineral Assortment) — gemstone

Chakra Crystal Bracelet

Mixed Mineral Assortment

River Stone (likely Basalt or Greywacke) (Basalt with mineral veining) — igneous

River Stone (likely Basalt or Greywacke)

Basalt with mineral veining

Milky quartz (rough quartz crystal) (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz (rough quartz crystal)

Quartz, silicon dioxide (SiO₂)

Dark speckled granite pebble (Granite, a quartz–feldspar–mica plutonic rock) — igneous

Dark speckled granite pebble

Granite, a quartz–feldspar–mica plutonic rock

Quartz with Sulfide Inclusions (Silicon Dioxide (SiO2) with metallic mineral inclusions) — mineral

Quartz with Sulfide Inclusions

Silicon Dioxide (SiO2) with metallic mineral inclusions

Likely fluorite fragments (Fluorite (calcium fluoride, CaF₂)) — mineral

Likely fluorite fragments

Fluorite (calcium fluoride, CaF₂)

Weathered mica-rich schist (likely muscovite schist) (Muscovite–quartz schist; chiefly muscovite mica and quartz, with possible feldspar and iron-bearing minerals) — metamorphic

Weathered mica-rich schist (likely muscovite schist)

Muscovite–quartz schist; chiefly muscovite mica and quartz, with possible feldspar and iron-bearing minerals

Calcite (Calcite (Mineral; CaCO₃)) — Mineral

Calcite

Calcite (Mineral; CaCO₃)

Unidentified metallic mineral or meteorite fragment (Indeterminate; possible native metal-bearing sulfide or iron meteorite fragment) — mineral

Unidentified metallic mineral or meteorite fragment

Indeterminate; possible native metal-bearing sulfide or iron meteorite fragment

Small rough mineral/rock specimen (not confidently identifiable) (Undetermined; image detail is insufficient for a reliable identification) — mineral

Small rough mineral/rock specimen (not confidently identifiable)

Undetermined; image detail is insufficient for a reliable identification

Small pale mineral fragment (Unidentified; possibly quartz, calcite, or feldspar) — mineral

Small pale mineral fragment

Unidentified; possibly quartz, calcite, or feldspar

Serpentine (likely serpentinite) (Serpentine-group minerals, chiefly antigorite, lizardite, and/or chrysotile; commonly with magnetite and minor brucite) — metamorphic

Serpentine (likely serpentinite)

Serpentine-group minerals, chiefly antigorite, lizardite, and/or chrysotile; commonly with magnetite and minor brucite

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Amethyst (Quartz (SiO2)) — mineral

Amethyst

Quartz (SiO2)

Lepidolite (K(Li,Al)3(Al,Si,V)4O10(F,OH)2) — mineral

Lepidolite

K(Li,Al)3(Al,Si,V)4O10(F,OH)2

Copper Ore with Malachite (Cuprite and Malachite in host rock (Cu2O and Cu2CO3(OH)2)) — mineral

Copper Ore with Malachite

Cuprite and Malachite in host rock (Cu2O and Cu2CO3(OH)2)

Quartz crystal cluster in matrix (Silicon dioxide (SiO2)) — mineral

Quartz crystal cluster in matrix

Silicon dioxide (SiO2)

Alabaster (Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)) — sedimentary

Alabaster

Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)

Jasper Mushroom Carving (Silicon Dioxide (Microcrystalline Quartz, SiO2)) — mineral

Jasper Mushroom Carving

Silicon Dioxide (Microcrystalline Quartz, SiO2)

Copper Ore (Malachite and Limonite bearing) (Cuprite, Malachite, and Limonite mixture) — mineral

Copper Ore (Malachite and Limonite bearing)

Cuprite, Malachite, and Limonite mixture

Banded Iron Formation (Fragment) (Banded Iron Formation (BIF)) — sedimentary

Banded Iron Formation (Fragment)

Banded Iron Formation (BIF)

Calcite (Honey Calcite and Agate) (Calcium Carbonate (CaCO3)) — mineral

Calcite (Honey Calcite and Agate)

Calcium Carbonate (CaCO3)

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

K-Feldspar (Potassium Feldspar / Pink Feldspar) (KAlSi3O8 (Potassium Aluminum Silicate)) — mineral

K-Feldspar (Potassium Feldspar / Pink Feldspar)

KAlSi3O8 (Potassium Aluminum Silicate)

Banded Sandstone (Beach Pebble) (Quartz Arenite Sandstone) — sedimentary

Banded Sandstone (Beach Pebble)

Quartz Arenite Sandstone

Small weathered fossil or mineral fragment (Indeterminate; possibly fossilized shell, bone, or a pale carbonate mineral) — fossil

Small weathered fossil or mineral fragment

Indeterminate; possibly fossilized shell, bone, or a pale carbonate mineral