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

Quartz Pebble (Crystalline Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Blue Apatite (Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)) — mineral

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Limonite pseudo-concretion (Ironstone) (Limonite (FeO(OH)·nH2O) / Goethite) — sedimentary

Limonite pseudo-concretion (Ironstone)

Limonite (FeO(OH)·nH2O) / Goethite

Quartz Pebble (Quartz (Silicon Dioxide - SiO2)) — mineral

Quartz Pebble

Quartz (Silicon Dioxide - SiO2)

Limonite Stained Basalt (Hydrated Iron Oxide on Mafic Volcanic Rock (FeO(OH)·nH2O)) — igneous

Limonite Stained Basalt

Hydrated Iron Oxide on Mafic Volcanic Rock (FeO(OH)·nH2O)

Speckled feldspar-rich pebble (Likely leucocratic granite or granitic pegmatite, chiefly potassium feldspar with dark biotite or amphibole) — igneous

Speckled feldspar-rich pebble

Likely leucocratic granite or granitic pegmatite, chiefly potassium feldspar with dark biotite or amphibole

Amygdaloidal Basalt (Amygdaloidal Basalt (containing quartz/agate or zeolite fill)) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt (containing quartz/agate or zeolite fill)

Sodalite (Na8Al6Si6O24Cl2) — mineral

Sodalite

Na8Al6Si6O24Cl2

Sandstone (Clastic sedimentary rock (Quartz arenite)) — sedimentary

Sandstone

Clastic sedimentary rock (Quartz arenite)

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

Milky quartz (rough quartz specimen)

Quartz, silicon dioxide (SiO₂)

Quartz Vein in Hematitic Siltstone (Hydrothermal Quartz (SiO2) in Ferriferous Matrix) — metamorphic

Quartz Vein in Hematitic Siltstone

Hydrothermal Quartz (SiO2) in Ferriferous Matrix

Dark green mineral specimen, possibly serpentine or epidote (Tentatively serpentine-group mineral, Mg₃Si₂O₅(OH)₄, or epidote, Ca₂(Al,Fe)₃Si₃O₁₂(OH)) — mineral

Dark green mineral specimen, possibly serpentine or epidote

Tentatively serpentine-group mineral, Mg₃Si₂O₅(OH)₄, or epidote, Ca₂(Al,Fe)₃Si₃O₁₂(OH)

Turquoise (Turquoise, CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Turquoise, CuAl6(PO4)4(OH)8·4H2O

Banded quartz-rich rock (possibly pegmatite) (Likely quartz–feldspar pegmatite; identification is tentative from the photo) — igneous

Banded quartz-rich rock (possibly pegmatite)

Likely quartz–feldspar pegmatite; identification is tentative from the photo

Travertine (Calcium Carbonate (CaCO3)) — sedimentary

Travertine

Calcium Carbonate (CaCO3)

Limonite (Yellow Ochre) (Hydrated iron(III) oxide-hydroxides (FeO(OH)·nH2O)) — mineral

Limonite (Yellow Ochre)

Hydrated iron(III) oxide-hydroxides (FeO(OH)·nH2O)

Limonite (Iron Ore) (Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

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

Greenstone pebble (likely serpentinite) (Serpentinite, composed mainly of serpentine-group minerals) — metamorphic

Greenstone pebble (likely serpentinite)

Serpentinite, composed mainly of serpentine-group minerals

Milky Quartz with Mica Matrix (SiO2 (Silicon Dioxide) with Muscovite/Biotite mica) — mineral

Milky Quartz with Mica Matrix

SiO2 (Silicon Dioxide) with Muscovite/Biotite mica

Prehnite (Prehnite (Ca2Al2Si3O10(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Fluorite (specifically Blue John or Banded Fluorite) (Calcium Fluoride (CaF2)) — mineral

Fluorite (specifically Blue John or Banded Fluorite)

Calcium Fluoride (CaF2)

Gneiss (Cobble) (Gneiss) — metamorphic

Gneiss (Cobble)

Gneiss

Banded Gneiss (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Iron-stained quartz vein in altered host rock (Quartz (SiO₂) with iron oxides/hydroxides, likely hematite and goethite; host rock uncertain from the image) — metamorphic

Iron-stained quartz vein in altered host rock

Quartz (SiO₂) with iron oxides/hydroxides, likely hematite and goethite; host rock uncertain from the image

Quartz Mineral (Silicon dioxide (SiO2)) — mineral

Quartz Mineral

Silicon dioxide (SiO2)

Quartz Mineral (Silicon Dioxide (SiO2)) — mineral

Quartz Mineral

Silicon Dioxide (SiO2)

Quartz Mineral (Silicon Dioxide (SiO2)) — mineral

Quartz Mineral

Silicon Dioxide (SiO2)

Tumbled brown quartz (likely smoky quartz) (Quartz, silicon dioxide (SiO₂); brown coloration may be smoky quartz or iron-stained quartz) — mineral

Tumbled brown quartz (likely smoky quartz)

Quartz, silicon dioxide (SiO₂); brown coloration may be smoky quartz or iron-stained quartz

Greenschist (Chlorite Schist (Greenschist Facies)) — metamorphic

Greenschist

Chlorite Schist (Greenschist Facies)

Native Copper (Native Copper (Cu)) — mineral

Native Copper

Native Copper (Cu)

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Sandstone with Manganese Oxide Patina (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone with Manganese Oxide Patina

Clastic Sedimentary Rock (primarily SiO2)

Quartz Mineral (Silicon Dioxide (SiO2)) — mineral

Quartz Mineral

Silicon Dioxide (SiO2)

Gold Mineral (Native Gold (Au)) — mineral

Gold Mineral

Native Gold (Au)

Fluorite (Calcium fluoride (CaF2)) — mineral

Fluorite

Calcium fluoride (CaF2)

Sandstone (Sandstone (SiO2-rich framework with variable matrix)) — sedimentary

Sandstone

Sandstone (SiO2-rich framework with variable matrix)

Sandstone pebble (Sandstone (SiO2 with iron oxides)) — sedimentary

Sandstone pebble

Sandstone (SiO2 with iron oxides)

Pyrite on Quartz matrix (Iron Disulfide (FeS2) on Silicon Dioxide (SiO2)) — mineral

Pyrite on Quartz matrix

Iron Disulfide (FeS2) on Silicon Dioxide (SiO2)

Specular Hematite (Hematite (Fe2O3)) — mineral

Specular Hematite

Hematite (Fe2O3)

Moss Agate (SiO2) — mineral

Moss Agate

SiO2

Jade (likely Jadeite) (Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)) — Mineral

Jade (likely Jadeite)

Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)