Rock Identifier

Category

Mineral Composite

Browse mineral composite specimens identified by the Rock Identifier community.

Learn about Mineral Composite in the encyclopedia

Glauconite

Hutcheonite

Halite

Sperrylite

Sea Sediment Jasper

Baddeleyite

Anatase

Brookite

Talc

Euxenite

Eltyubyuite

Buergerite

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Gravel and Sand Mixture (Unconsolidated clastic sediment) — sedimentary

Gravel and Sand Mixture

Unconsolidated clastic sediment

Small dark pebble, likely a fine-grained metamorphic rock (Undetermined; possibly slate or amphibolite) — metamorphic

Small dark pebble, likely a fine-grained metamorphic rock

Undetermined; possibly slate or amphibolite

Sidewalk Chalk (Calcium Carbonate (CaCO3) / Gypsum) — sedimentary

Sidewalk Chalk

Calcium Carbonate (CaCO3) / Gypsum

Weathered banded gneiss (probable) (Foliated quartz–feldspar gneiss; exact minerals cannot be confirmed from the image) — metamorphic

Weathered banded gneiss (probable)

Foliated quartz–feldspar gneiss; exact minerals cannot be confirmed from the image

Granite (Plutonic felsic igneous rock) — igneous

Granite

Plutonic felsic igneous rock

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Rhodochrosite (Manganese Carbonate (MnCO3)) — mineral

Rhodochrosite

Manganese Carbonate (MnCO3)

Quartz-rich pegmatite (milky quartz with feldspar) (Quartz (SiO₂)–feldspar pegmatite, likely containing albite or orthoclase) — igneous

Quartz-rich pegmatite (milky quartz with feldspar)

Quartz (SiO₂)–feldspar pegmatite, likely containing albite or orthoclase

Basalt (Basalt) — Igneous

Basalt

Basalt

Green copper-bearing rock, possibly chrysocolla-bearing matrix (Undetermined copper-mineralized rock; green areas may include chrysocolla, malachite, or chlorite) — metamorphic

Green copper-bearing rock, possibly chrysocolla-bearing matrix

Undetermined copper-mineralized rock; green areas may include chrysocolla, malachite, or chlorite

Granite (Granite, a coarse-grained intrusive felsic rock composed mainly of quartz, feldspar, and mica) — igneous

Granite

Granite, a coarse-grained intrusive felsic rock composed mainly of quartz, feldspar, and mica

Geode half (Geode (often quartz/chalcedony based)) — sedimentary or igneous

Geode half

Geode (often quartz/chalcedony based)

sedimentary or igneous

Hemimorphite (Hemimorphite (Zn4Si2O7(OH)2·H2O)) — mineral

Hemimorphite

Hemimorphite (Zn4Si2O7(OH)2·H2O)

Vesicular Basalt / Scoria pebble (Extrusive igneous rock with amygdaloidal infilling) — igneous

Vesicular Basalt / Scoria pebble

Extrusive igneous rock with amygdaloidal infilling

Green Aventurine (Quartz (SiO2) with fuchsite inclusions) — mineral

Green Aventurine

Quartz (SiO2) with fuchsite inclusions

Native Copper (Copper (Cu)) — mineral

Native Copper

Copper (Cu)

Yellow Ochre / Limonite (Hydrated ferric oxide (FeO(OH)·nH2O)) — mineral

Yellow Ochre / Limonite

Hydrated ferric oxide (FeO(OH)·nH2O)

Likely serpentinite (greenstone pebble) (Serpentinite, composed mainly of serpentine-group minerals (e.g., lizardite, chrysotile, or antigorite)) — metamorphic

Likely serpentinite (greenstone pebble)

Serpentinite, composed mainly of serpentine-group minerals (e.g., lizardite, chrysotile, or antigorite)

Mica-rich schist (likely biotite schist) (Mica schist, composed chiefly of quartz and mica; exact minerals cannot be confirmed from the image) — metamorphic

Mica-rich schist (likely biotite schist)

Mica schist, composed chiefly of quartz and mica; exact minerals cannot be confirmed from the image

Apatite (Ca5(PO4)3(F,Cl,OH)) — mineral

Apatite

Ca5(PO4)3(F,Cl,OH)

Quartz–feldspar–mica rock, possibly pegmatite (Coarse-grained granitic rock (compositionally granitic pegmatite); exact identification requires closer examination) — igneous

Quartz–feldspar–mica rock, possibly pegmatite

Coarse-grained granitic rock (compositionally granitic pegmatite); exact identification requires closer examination

Limonite (FeO(OH)·nH2O) — mineral

Limonite

FeO(OH)·nH2O

Unidentified small mineral specimen (Undetermined from the image) — mineral

Unidentified small mineral specimen

Undetermined from the image

Rainbow Fluorite (Fluorite (Calcium Fluoride, CaF2)) — mineral

Rainbow Fluorite

Fluorite (Calcium Fluoride, CaF2)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Blue Apatite (Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)) — mineral

Blue Apatite

Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)

Peridot (rough olivine crystals) (Olivine, chiefly forsterite–fayalite solid solution, (Mg,Fe)₂SiO₄; gem-quality olivine is called peridot) — mineral

Peridot (rough olivine crystals)

Olivine, chiefly forsterite–fayalite solid solution, (Mg,Fe)₂SiO₄; gem-quality olivine is called peridot

Lapis Lazuli (Low-grade) (Lapis Lazuli (Aggregate of Lazurite, Calcite, and Pyrite)) — metamorphic

Lapis Lazuli (Low-grade)

Lapis Lazuli (Aggregate of Lazurite, Calcite, and Pyrite)

Bauxite (Bauxite (Al2O3·2H2O)) — sedimentary

Bauxite

Bauxite (Al2O3·2H2O)

Lapis Lazuli (Lapis Lazuli (Primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)) — metamorphic

Lapis Lazuli

Lapis Lazuli (Primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Lapis Lazuli (Lapis Lazuli (Complex aggregate mainly of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)) — metamorphic

Lapis Lazuli

Lapis Lazuli (Complex aggregate mainly of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Lapis Lazuli (Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite) — metamorphic

Lapis Lazuli

Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite

Lapis Lazuli (Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)) — metamorphic

Lapis Lazuli

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Sandstone (Quartz Arenite / Clastic Sedimentary Rock) — sedimentary

Sandstone

Quartz Arenite / Clastic Sedimentary Rock

Granite Pebble (Intrusive Igneous Rock) — igneous

Granite Pebble

Intrusive Igneous Rock

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Weathered rock pebble, possibly quartz-rich sandstone (Uncertain from the image; likely quartz-bearing sandstone with iron-oxide staining) — sedimentary

Weathered rock pebble, possibly quartz-rich sandstone

Uncertain from the image; likely quartz-bearing sandstone with iron-oxide staining

Polished serpentine (likely green serpentine) (Serpentine-group minerals, chiefly antigorite, lizardite, or chrysotile; composition varies) — metamorphic

Polished serpentine (likely green serpentine)

Serpentine-group minerals, chiefly antigorite, lizardite, or chrysotile; composition varies

Granite (Granite, a coarse-grained felsic intrusive igneous rock composed chiefly of quartz, feldspar, and mica or amphibole) — igneous

Granite

Granite, a coarse-grained felsic intrusive igneous rock composed chiefly of quartz, feldspar, and mica or amphibole