Rock Identifier

Category

Mineral_rock

Browse mineral_rock specimens identified by the Rock Identifier community.

Learn about Mineral_rock in the encyclopedia

Rock Salt

Calc-Silicate Rock

Calc-Silicate Rock

Halite

Dolomite

Gypsum

Coal

Claystone

Carbonatite

Serpentinite

Skarn

Schist

Shale

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

Pyrite with Quartz

Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)

Fluorite (Fluor-spar) (Calcium Fluoride (CaF2)) — mineral

Fluorite (Fluor-spar)

Calcium Fluoride (CaF2)

Small metallic-looking rock fragment (Uncertain; possibly galena-bearing ore or mica-rich schist) — mineral

Small metallic-looking rock fragment

Uncertain; possibly galena-bearing ore or mica-rich schist

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

Blue Apatite

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

Limonite / Goethite Ironstone (FeO(OH)·nH2O (Hydrous iron oxide)) — mineral

Limonite / Goethite Ironstone

FeO(OH)·nH2O (Hydrous iron oxide)

Metallic sulfide-bearing rock, likely galena-rich ore (Galena (lead sulfide, PbS), possibly mixed with pyrite/chalcopyrite and host rock) — mineral

Metallic sulfide-bearing rock, likely galena-rich ore

Galena (lead sulfide, PbS), possibly mixed with pyrite/chalcopyrite and host rock

Sandstone (with potential mineral staining/concretions) (Arenite (SiO2 based)) — sedimentary

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Gneiss (Gneiss (Metamorphic rock)) — metamorphic

Gneiss

Gneiss (Metamorphic rock)

Granitic Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Granitic Gneiss

Gneiss (Metamorphic Rock)

Rounded, weathered stone (likely basaltic or andesitic river cobble) (Fine-grained mafic to intermediate volcanic rock; exact identification requires examination of a fresh surface) — igneous

Rounded, weathered stone (likely basaltic or andesitic river cobble)

Fine-grained mafic to intermediate volcanic rock; exact identification requires examination of a fresh surface

Lapis Lazuli ((Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2 (Complex silicate rock)) — metamorphic

Lapis Lazuli

(Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2 (Complex silicate rock)

Weathered greenish metamorphic rock, likely serpentinite (Serpentinite, dominated by serpentine-group minerals (commonly antigorite, lizardite, or chrysotile)) — metamorphic

Weathered greenish metamorphic rock, likely serpentinite

Serpentinite, dominated by serpentine-group minerals (commonly antigorite, lizardite, or chrysotile)

Limonite (FeO(OH)·nH2O) — mineral

Limonite

FeO(OH)·nH2O

Weathered quartz-rich metamorphic rock, likely milky quartz or quartzite (Quartz (SiO₂), possibly quartzite with iron-oxide staining and dark inclusions) — metamorphic

Weathered quartz-rich metamorphic rock, likely milky quartz or quartzite

Quartz (SiO₂), possibly quartzite with iron-oxide staining and dark inclusions

Quartz Vein Rock (Silicon Dioxide (SiO2)) — mineral

Quartz Vein Rock

Silicon Dioxide (SiO2)

Iron-stained quartz (probable quartz vein fragment) (Quartz, SiO₂, with iron-oxide staining) — mineral

Iron-stained quartz (probable quartz vein fragment)

Quartz, SiO₂, with iron-oxide staining

Limonite (FeO(OH)·nH2O) — mineral

Limonite

FeO(OH)·nH2O

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)

Fossilized Shark Tooth (Chondrichthyes (Class)) — fossil

Fossilized Shark Tooth

Chondrichthyes (Class)

Rainbow Fluorite (Calcium Fluoride (CaF2)) — mineral

Rainbow Fluorite

Calcium Fluoride (CaF2)

Botryoidal Hematite (Iron(III) oxide (Fe2O3)) — mineral

Botryoidal Hematite

Iron(III) oxide (Fe2O3)

Weathered dark volcanic rock, possibly basalt (Basalt (tentative; likely iron-rich mafic volcanic rock)) — igneous

Weathered dark volcanic rock, possibly basalt

Basalt (tentative; likely iron-rich mafic volcanic rock)

Milky quartz (quartz-rich rock) (Quartz, silicon dioxide (SiO₂); likely massive quartz with minor iron-stained impurities) — mineral

Milky quartz (quartz-rich rock)

Quartz, silicon dioxide (SiO₂); likely massive quartz with minor iron-stained impurities

Rhodochrosite with Quartz (Manganese Carbonate (MnCO3) with Silicon Dioxide (SiO2)) — mineral

Rhodochrosite with Quartz

Manganese Carbonate (MnCO3) with Silicon Dioxide (SiO2)

Granite (Intrusive igneous rock) — igneous

Granite

Intrusive igneous rock

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

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz-rich pegmatite fragment (Granite/pegmatite; chiefly quartz (SiO₂) and feldspar, with possible biotite or tourmaline) — igneous

Quartz-rich pegmatite fragment

Granite/pegmatite; chiefly quartz (SiO₂) and feldspar, with possible biotite or tourmaline

Carved serpentine wing sculpture (Serpentine-group rock, chiefly antigorite/lizardite: Mg3Si2O5(OH)4) — metamorphic

Carved serpentine wing sculpture

Serpentine-group rock, chiefly antigorite/lizardite: Mg3Si2O5(OH)4

Bornite (Bornite (Cu5FeS4)) — mineral

Bornite

Bornite (Cu5FeS4)

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

Pyrite on Quartz matrix

Iron Disulfide (FeS2) on Silicon Dioxide (SiO2)

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

Limonite (Yellow Ochre)

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

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

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

Vesicular Basalt / Scoria pebble

Extrusive igneous rock with amygdaloidal infilling

Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

Galena (Lead Sulfide (PbS)) — mineral

Galena

Lead Sulfide (PbS)

Tumbled basalt pebble (Basalt (fine-grained mafic volcanic rock; commonly plagioclase, pyroxene, and iron-titanium oxides)) — igneous

Tumbled basalt pebble

Basalt (fine-grained mafic volcanic rock; commonly plagioclase, pyroxene, and iron-titanium oxides)

Banded gneiss (Foliated gneiss, likely quartz–feldspar–biotite or amphibole gneiss) — metamorphic

Banded gneiss

Foliated gneiss, likely quartz–feldspar–biotite or amphibole gneiss

Pink Granite Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Pink Granite Gneiss

Gneiss (High-grade metamorphic rock)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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