Rock Identifier

Category

Mineral (Native Element Alloy)

Browse mineral (native element alloy) specimens identified by the Rock Identifier community.

Learn about Mineral (Native Element Alloy) in the encyclopedia

Sulfur

Copper

Gold

Platinum

Silver

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Brookite

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Shark Tooth Fossil (Carcharodonta (order Lamniformes), likely Carcharias spp.) — fossil

Shark Tooth Fossil

Carcharodonta (order Lamniformes), likely Carcharias spp.

Blue Apatite (Fluorapatite / Apatite group (Ca5(PO4)3(F,Cl,OH))) — mineral

Blue Apatite

Fluorapatite / Apatite group (Ca5(PO4)3(F,Cl,OH))

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Rounded quartz-rich pebble (Likely milky quartz or quartzite (SiO₂)) — mineral

Rounded quartz-rich pebble

Likely milky quartz or quartzite (SiO₂)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz pebble (Quartz (Silicon dioxide, SiO2)) — mineral

Quartz pebble

Quartz (Silicon dioxide, SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz River Cobble (Silicon Dioxide (SiO2)) — mineral

Quartz River Cobble

Silicon Dioxide (SiO2)

Limonite with Iron Inclusions (Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O)) — sedimentary

Limonite with Iron Inclusions

Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Blue Goldstone (Aventurine Glass) — man-made glass

Blue Goldstone

Aventurine Glass

Gossan (with secondary copper minerals) (Iron-rich oxidized rock cap (Limonite/Goethite with Malachite/Chrysocolla inclusions)) — metamorphic

Gossan (with secondary copper minerals)

Iron-rich oxidized rock cap (Limonite/Goethite with Malachite/Chrysocolla inclusions)

Quartz with Pyrite inclusions (Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)) — mineral

Quartz with Pyrite inclusions

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)

Milky Quartz (with Chlorite/Mineral Inclusions) (Silicon Dioxide (SiO2)) — mineral

Milky Quartz (with Chlorite/Mineral Inclusions)

Silicon Dioxide (SiO2)

Eudialyte in Matrix (Na15Ca6(Fe,Mn)3Zr3(Si,Nb)(Si25O73)(O,OH,H2O)3(Cl,OH)2) — mineral

Eudialyte in Matrix

Na15Ca6(Fe,Mn)3Zr3(Si,Nb)(Si25O73)(O,OH,H2O)3(Cl,OH)2

Banded Calcite (Mexican Onyx) (Calcium Carbonate (CaCO3)) — mineral

Banded Calcite (Mexican Onyx)

Calcium Carbonate (CaCO3)

Copper Ore (Malachite and Azurite on Host Rock) (Cuprite, Malachite, and Azurite dissemination in gangue) — mineral

Copper Ore (Malachite and Azurite on Host Rock)

Cuprite, Malachite, and Azurite dissemination in gangue

Quartz with inclusions (likely Tourmaline or Biotite) (Silicon Dioxide (SiO2)) — mineral

Quartz with inclusions (likely Tourmaline or Biotite)

Silicon Dioxide (SiO2)

Orange Calcite (likely polished specimen) (Calcite) — Mineral

Orange Calcite (likely polished specimen)

Calcite

Granite (Granite (a common term for a felsic intrusive igneous rock)) — igneous

Granite

Granite (a common term for a felsic intrusive igneous rock)

Granitic Pegmatite (Granite Pegmatite (principally KAlSi3O8, SiO2, and KAl2(AlSi3O10)(OH)2)) — igneous

Granitic Pegmatite

Granite Pegmatite (principally KAlSi3O8, SiO2, and KAl2(AlSi3O10)(OH)2)

Amethyst (Chevron Amethyst) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (Chevron Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Pink Mimbres Agate / Plume Agate (Silicon dioxide (SiO2) with mineral inclusions) — gemstone

Pink Mimbres Agate / Plume Agate

Silicon dioxide (SiO2) with mineral inclusions

Smoky quartz-bearing pegmatitic rock (Quartz, SiO₂, likely with feldspar and mica inclusions) — mineral

Smoky quartz-bearing pegmatitic rock

Quartz, SiO₂, likely with feldspar and mica inclusions

Mica Schist (Muscovite/Biotite Schist) — metamorphic

Mica Schist

Muscovite/Biotite Schist

Sandstone Concretion (Sedimentary Concretion (Quartz sand bound by mineral cement)) — sedimentary

Sandstone Concretion

Sedimentary Concretion (Quartz sand bound by mineral cement)

Milky Quartz Pebble with Matrix (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz Pebble with Matrix

Quartz (Silicon Dioxide, SiO2)

Limonite (with Pyrite) (Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O) — mineral

Limonite (with Pyrite)

Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O

Granitic Gneiss (Gneiss (Complex silicate composition)) — metamorphic

Granitic Gneiss

Gneiss (Complex silicate composition)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz with Country Rock contact (Silicon Dioxide (SiO2) in contact with Metamorphic/Igneous rock) — mineral

Milky Quartz with Country Rock contact

Silicon Dioxide (SiO2) in contact with Metamorphic/Igneous rock

Milky Quartz (Crystalline Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Turquenite (Dyed Howlite) (Dyed Ca2B5SiO9(OH)5 (Calcium Borosilicate Hydroxide)) — mineral

Turquenite (Dyed Howlite)

Dyed Ca2B5SiO9(OH)5 (Calcium Borosilicate Hydroxide)

Rainbow Moonstone (White Labradorite (Plagioclase Feldspar), (Na,Ca)(Al,Si)4O8) — gemstone

Rainbow Moonstone

White Labradorite (Plagioclase Feldspar), (Na,Ca)(Al,Si)4O8

Pyrite (Fool's Gold) (Iron Disulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Tumbled Black Tourmaline (Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)) — mineral

Tumbled Black Tourmaline

Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz pebble (Silicon dioxide (SiO2)) — sedimentary

Quartz pebble

Silicon dioxide (SiO2)