Rock Identifier

Category

Mineral

Browse mineral specimens identified by the Rock Identifier community.

Learn about Mineral in the encyclopedia

Acanthite

Adirondack Garnet

Adirondack Garnet

Adularia

Agate

Albite

Alkali Feldspar

Alkali Feldspar

Amazonite

Anatase

Andalusite

Angelite

Anglesite

Anhydrite

Malachite (Malachite (Cu2CO3(OH)2)) — mineral

Malachite

Malachite (Cu2CO3(OH)2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Malachite (Copper Carbonate Hydroxide (Cu2CO3(OH)2)) — mineral

Malachite

Copper Carbonate Hydroxide (Cu2CO3(OH)2)

Sandstone with Ironstone Concretion (Arenite with Ferruginous Cement) — sedimentary

Sandstone with Ironstone Concretion

Arenite with Ferruginous Cement

Mica schist (Schist dominated by muscovite/biotite mica, commonly with quartz and feldspar) — metamorphic

Mica schist

Schist dominated by muscovite/biotite mica, commonly with quartz and feldspar

Gravel (Unconsolidated rock fragments / detrital sediment) — sedimentary

Gravel

Unconsolidated rock fragments / detrital sediment

Granite (Intrusive Igneous Rock (Felsic)) — igneous

Granite

Intrusive Igneous Rock (Felsic)

Basalt with Vesicular Amygdule (Extrusive igneous rock (Mafic)) — igneous

Basalt with Vesicular Amygdule

Extrusive igneous rock (Mafic)

Weathered mica schist (tentative) (Mica schist, likely muscovite–biotite schist with quartz and feldspar) — metamorphic

Weathered mica schist (tentative)

Mica schist, likely muscovite–biotite schist with quartz and feldspar

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

Blue Apatite

Fluoroapatite (Ca5(PO4)3F)

Banded Sandstone (River Cobble) (Arenite Sandstone with heavy mineral layering) — sedimentary

Banded Sandstone (River Cobble)

Arenite Sandstone with heavy mineral layering

Green Fluorite (Calcium Fluoride (CaF2)) — mineral

Green Fluorite

Calcium Fluoride (CaF2)

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

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Limonite (Iron Ore) (Limonite (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Limonite Concretion (Limonite (FeO(OH)·nH2O) Pseudomorph) — sedimentary

Limonite Concretion

Limonite (FeO(OH)·nH2O) Pseudomorph

Rough Diamond (Bort) (Diamond (C)) — mineral

Rough Diamond (Bort)

Diamond (C)

Hag Stone (Perforated sedimentary rock (typically sandstone or limestone)) — sedimentary

Hag Stone

Perforated sedimentary rock (typically sandstone or limestone)

Granite (Intrusive igneous rock) — igneous

Granite

Intrusive igneous rock

Fossil / Permineralized Bone (Tyrannosaurus rex fossil (Hydroxylapatite replaced by various minerals)) — sedimentary

Fossil / Permineralized Bone

Tyrannosaurus rex fossil (Hydroxylapatite replaced by various minerals)

Small pale mineral fragment (Unidentified; possibly quartz, calcite, or feldspar) — mineral

Small pale mineral fragment

Unidentified; possibly quartz, calcite, or feldspar

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Gypsum (Selenite sand) (Calcium sulfate dihydrate (CaSO4·2H2O)) — mineral

Gypsum (Selenite sand)

Calcium sulfate dihydrate (CaSO4·2H2O)

Fluorite on Host Rock (Calcium Fluoride (CaF2)) — mineral

Fluorite on Host Rock

Calcium Fluoride (CaF2)

Pyrite (Iron Pyrite (FeS2)) — mineral

Pyrite

Iron Pyrite (FeS2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Eudialyte (Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2) — mineral

Eudialyte

Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2

Weathered granite or granitic gneiss (Granite; chiefly quartz, feldspar, and mica, possibly with gneissic foliation) — igneous

Weathered granite or granitic gneiss

Granite; chiefly quartz, feldspar, and mica, possibly with gneissic foliation

Garden Quartz (Lodalite) (Silicon Dioxide with various mineral inclusions (SiO2)) — mineral

Garden Quartz (Lodalite)

Silicon Dioxide with various mineral inclusions (SiO2)

Limonite (Iron Ore / Ochre) (Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore / Ochre)

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

Granite (Intrusive Felsic Igneous Rock) — igneous

Granite

Intrusive Felsic Igneous Rock

Banded Gneiss (Gneiss) — metamorphic

Banded Gneiss

Gneiss

Weathered basalt pebble (Basalt, a fine-grained mafic volcanic rock; likely containing plagioclase and pyroxene with weathering products) — igneous

Weathered basalt pebble

Basalt, a fine-grained mafic volcanic rock; likely containing plagioclase and pyroxene with weathering products

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Gneiss (likely biotite–quartz–feldspar gneiss) (Foliated gneiss; primarily quartz (SiO₂), feldspar, and biotite mica) — metamorphic

Gneiss (likely biotite–quartz–feldspar gneiss)

Foliated gneiss; primarily quartz (SiO₂), feldspar, and biotite mica

Epidote (Calcium aluminum iron silicate (Ca2(Al, Fe)3(SiO4)3(OH))) — mineral

Epidote

Calcium aluminum iron silicate (Ca2(Al, Fe)3(SiO4)3(OH))

Basalt with Vesicular/Amygdaloidal Alteration (Extrusive Igneous Rock (Mafic)) — igneous

Basalt with Vesicular/Amygdaloidal Alteration

Extrusive Igneous Rock (Mafic)

Basalt with Amygdule (Aphanitic Mafic Volcanic Rock (Basalt) with Zeolite/Quartz Infill) — igneous

Basalt with Amygdule

Aphanitic Mafic Volcanic Rock (Basalt) with Zeolite/Quartz Infill

Epidote (Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))) — mineral

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

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

Yellow Apatite

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

Limonite (FeO(OH)·nH2O) — mineral

Limonite

FeO(OH)·nH2O

Polished serpentine pebble (Serpentinite, chiefly serpentine-group minerals (chrysotile, lizardite, antigorite)) — metamorphic

Polished serpentine pebble

Serpentinite, chiefly serpentine-group minerals (chrysotile, lizardite, antigorite)

Red Sandstone (Iron-stained) (Clastic sedimentary rock (primarily Quartz with Iron Oxides)) — sedimentary

Red Sandstone (Iron-stained)

Clastic sedimentary rock (primarily Quartz with Iron Oxides)