Rock Identifier

Category

Mineral Health

Browse mineral health specimens identified by the Rock Identifier community.

Learn about Mineral Health in the encyclopedia

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Brookite

Talc

Euxenite

Eltyubyuite

Buergerite

Dolomite

Fossilized Gastropod / Coral (Phylum Mollusca / Cnidaria (Silicified or Calcified)) — fossil

Fossilized Gastropod / Coral

Phylum Mollusca / Cnidaria (Silicified or Calcified)

Aura Quartz (Titanium/Rainbow Quartz) (SiO2 (Silicon Dioxide) with metallic coating) — mineral

Aura Quartz (Titanium/Rainbow Quartz)

SiO2 (Silicon Dioxide) with metallic coating

Fluorite (Calcium fluoride (CaF2)) — mineral

Fluorite

Calcium fluoride (CaF2)

Coarse-grained gray metamorphic rock, likely gneiss (Biotite–quartz–feldspar gneiss (probable)) — metamorphic

Coarse-grained gray metamorphic rock, likely gneiss

Biotite–quartz–feldspar gneiss (probable)

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

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Quartz Vein in Sedimentary Rock (Silicon Dioxide (SiO2) with host Chert or Limestone) — mineral

Quartz Vein in Sedimentary Rock

Silicon Dioxide (SiO2) with host Chert or Limestone

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

Epidote

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

K-Feldspar (Potassium Feldspar) (Orthoclase / Microcline (KAlSi3O8)) — mineral

K-Feldspar (Potassium Feldspar)

Orthoclase / Microcline (KAlSi3O8)

Microcline Feldspar (KAlSi3O8) — mineral

Microcline Feldspar

KAlSi3O8

Graphite (Graphite (Carbon, C)) — mineral

Graphite

Graphite (Carbon, C)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Limonite (FeO(OH)·nH2O) — mineral

Limonite

FeO(OH)·nH2O

Limonite (FeO(OH)·nH2O (Hydrated iron oxide-hydroxide)) — mineral

Limonite

FeO(OH)·nH2O (Hydrated iron oxide-hydroxide)

Muscovite (Muscovite (KAl2(AlSi3O10)(OH)2)) — mineral

Muscovite

Muscovite (KAl2(AlSi3O10)(OH)2)

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

Malachite-bearing Rock (Cu2CO3(OH)2) — mineral

Malachite-bearing Rock

Cu2CO3(OH)2

Copper Ore / Altered Granodiorite (Cupriferous rock with silicate gangue) — mineral

Copper Ore / Altered Granodiorite

Cupriferous rock with silicate gangue

Graphite (Carbon (C)) — mineral

Graphite

Carbon (C)

Galena (Lead Sulfide (PbS)) — mineral

Galena

Lead Sulfide (PbS)

Muscovite Mica (KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica

KAl2(AlSi3O10)(OH)2

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

Epidote

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

Muscovite Mica (KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Muscovite Mica (Muscovite (KAl2(AlSi3O10)(OH)2)) — mineral

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Chalcopyrite (Copper Iron Sulfide (CuFeS2)) — mineral

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Fluorite (Calcium fluoride, CaF2) — Mineral

Fluorite

Calcium fluoride, CaF2

Quartz crystal cluster (Quartz (silicon dioxide, SiO₂), likely milky or druzy quartz) — mineral

Quartz crystal cluster

Quartz (silicon dioxide, SiO₂), likely milky or druzy quartz

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

Apatite

Fluorapatite / Chlorapatite (Ca5(PO4)3(F,Cl,OH))

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

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

Botryoidal Hematite

Iron(III) oxide (Fe2O3)

Vanadinite (Lead Chlorovanadate, Pb5(VO4)3Cl) — mineral

Vanadinite

Lead Chlorovanadate, Pb5(VO4)3Cl

Small brown mineral or rock fragment (Undetermined; the image does not show enough detail for reliable identification) — mineral

Small brown mineral or rock fragment

Undetermined; the image does not show enough detail for reliable identification

Sandstone (Sandstone (composed primarily of sand-sized minerals or rock grains)) — sedimentary

Sandstone

Sandstone (composed primarily of sand-sized minerals or rock grains)

Pyrite in Quartz (Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)) — Mineral

Pyrite in Quartz

Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)

Microcline Feldspar (Amazonite or White Feldspar) (KAlSi3O8) — mineral

Microcline Feldspar (Amazonite or White Feldspar)

KAlSi3O8

Amygdaloidal Basalt with Quartz Veining (Basalt (Extrusive Igneous Rock) with Quartz (SiO2) veining) — igneous

Amygdaloidal Basalt with Quartz Veining

Basalt (Extrusive Igneous Rock) with Quartz (SiO2) veining

Gneiss (Gneiss (foliated metamorphic rock)) — metamorphic

Gneiss

Gneiss (foliated metamorphic rock)

Granite with Mafic Xenolith (Intrusive Igneous Rock (Felsic to Intermediate)) — igneous

Granite with Mafic Xenolith

Intrusive Igneous Rock (Felsic to Intermediate)

Granite (Granite (Phaneritic Quartz-Feldspar Plutonic Rock)) — igneous

Granite

Granite (Phaneritic Quartz-Feldspar Plutonic Rock)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Blue apatite specimen (Apatite-group mineral, commonly fluorapatite (Ca₅(PO₄)₃F)) — mineral

Blue apatite specimen

Apatite-group mineral, commonly fluorapatite (Ca₅(PO₄)₃F)

Basalt with an orange mineral vein (Fine-grained basalt, likely containing iron-stained calcite or zeolite; exact identification requires testing) — igneous

Basalt with an orange mineral vein

Fine-grained basalt, likely containing iron-stained calcite or zeolite; exact identification requires testing