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

Galena-bearing quartz vein rock (Galena (PbS), with quartz (SiO₂) and likely minor sulfides) — mineral

Galena-bearing quartz vein rock

Galena (PbS), with quartz (SiO₂) and likely minor sulfides

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Quartz-veined metamorphic rock, likely greenschist or altered metavolcanic (Chlorite–actinolite–epidote-bearing metavolcanic rock with quartz veins; exact identification requires testing) — metamorphic

Quartz-veined metamorphic rock, likely greenschist or altered metavolcanic

Chlorite–actinolite–epidote-bearing metavolcanic rock with quartz veins; exact identification requires testing

Red-and-gray banded jasper (Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides) — mineral

Red-and-gray banded jasper

Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides

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

Milky quartz (rough quartz pebble)

Quartz, silicon dioxide (SiO₂)

Milky quartz pebbles (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz pebbles

Quartz, silicon dioxide (SiO₂)

$Tumbled quartz pebble (Quartz (SiO₂), likely milky or fractured rock crystal) — mineral$

Tumbled quartz pebble

Quartz (SiO₂), likely milky or fractured rock crystal

Tumbled milky quartz (Quartz, silicon dioxide (SiO₂)) — mineral

Tumbled milky quartz

Quartz, silicon dioxide (SiO₂)

Limonite / Goethite (Ironstone) (Hydrated Iron(III) Oxide-Hydroxide FeO(OH)wnH2O) — sedimentary

Limonite / Goethite (Ironstone)

Hydrated Iron(III) Oxide-Hydroxide FeO(OH)wnH2O

Limonite / Ironstone Concretion (Hydrated Iron Oxide (FeO(OH)%C2%B7nH2O)) — sedimentary

Limonite / Ironstone Concretion

Hydrated Iron Oxide (FeO(OH)%C2%B7nH2O)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Limonite (Ironstone) (Limonite (mixture of hydrated iron(III) oxide-hydroxides)) — mineral

Limonite (Ironstone)

Limonite (mixture of hydrated iron(III) oxide-hydroxides)

Pegmatite (Feldspar and Quartz) (Pegmatite (KAlSi3O8 / SiO2)) — igneous

Pegmatite (Feldspar and Quartz)

Pegmatite (KAlSi3O8 / SiO2)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Sandstone (with Concretion) (Arenite / Quartzose Sandstone) — sedimentary

Sandstone (with Concretion)

Arenite / Quartzose Sandstone

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

Amygdaloidal Basalt with Agate/Zeolite Amygdules (Basalt (extrusive igneous rock) containing secondary mineral fillings) — igneous

Amygdaloidal Basalt with Agate/Zeolite Amygdules

Basalt (extrusive igneous rock) containing secondary mineral fillings

Turquoise (Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)) — mineral

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Prehnite (Prehnite - Ca2Al(AlSi3O10)(OH)2) — mineral

Prehnite

Prehnite - Ca2Al(AlSi3O10)(OH)2

Concretion (Septarian Concretion) — sedimentary

Concretion

Septarian Concretion

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Travertine (Calcium Carbonate (CaCO3)) — sedimentary

Travertine

Calcium Carbonate (CaCO3)

Rounded reddish-brown river cobble, likely weathered granite or granitic gneiss (Feldspar–quartz–mica rock; exact identification requires a fresh surface or testing) — igneous

Rounded reddish-brown river cobble, likely weathered granite or granitic gneiss

Feldspar–quartz–mica rock; exact identification requires a fresh surface or testing

Schist (Metamorphic Rock (Schist)) — metamorphic

Schist

Metamorphic Rock (Schist)

Granite (Intrusive Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)) — igneous

Granite

Intrusive Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)

Fossilized Shark Tooth (Chondrichthyes (Class)) — fossil

Fossilized Shark Tooth

Chondrichthyes (Class)

Schist (Mica Schist (Metamorphic rock)) — metamorphic

Schist

Mica Schist (Metamorphic rock)

Pyrite (on host rock) (Iron Sulfide (FeS2)) — mineral

Pyrite (on host rock)

Iron Sulfide (FeS2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Turquoise (Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O

Chakra Crystal Bracelet (Mixed Mineral Assortment) — gemstone

Chakra Crystal Bracelet

Mixed Mineral Assortment

Fossilized bone fragment (probable large mammal limb bone) (Mineral-replaced or permineralized bone; exact taxon cannot be determined from the image) — fossil

Fossilized bone fragment (probable large mammal limb bone)

Mineral-replaced or permineralized bone; exact taxon cannot be determined from the image

Greenstone / Epidosite (Epidosite (primary minerals: Epidote and Quartz)) — metamorphic

Greenstone / Epidosite

Epidosite (primary minerals: Epidote and Quartz)

Sandstone (Banded) (Arenite) — sedimentary

Sandstone (Banded)

Arenite

Sandstone (Ferruginous) (Sandstone (primarily SiO2 with iron oxide Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Sandstone (primarily SiO2 with iron oxide Fe2O3 staining)

Sandstone (Ferruginous) (Arenite with Iron-Oxide Cement) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement

Gossan (Limonite/Ironstone) (Hydrated Iron Oxide (FeO(OH)·nH2O)) — sedimentary

Gossan (Limonite/Ironstone)

Hydrated Iron Oxide (FeO(OH)·nH2O)

Polished brown jasper (likely brecciated or orbicular jasper) (Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides and other inclusions) — mineral

Polished brown jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides and other inclusions

Granite (Granite (phaneritic felsic intrusive rock)) — igneous

Granite

Granite (phaneritic felsic intrusive rock)

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