Rock Identifier

Community gallery

All rocks & minerals

Every specimen the Rock Identifier community has discovered, from desert agates to deep-sea basalts.

Explore the rock & mineral encyclopedia

Acanthite

Achroite

Adinole

Adirondack Garnet

Adirondack Garnet

Adularia

Agate

Albite

Albitite

Alexandrite

Alkali Feldspar

Alkali Feldspar

Almandine Garnet

Almandine Garnet

Alnöite

Quartz-veined Limestone (Sedimentary limestone with quartz/calcite veinlets) — sedimentary

Quartz-veined Limestone

Sedimentary limestone with quartz/calcite veinlets

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Agate (Silicon Dioxide (Chalcedony), SiO2) — gemstone

Agate

Silicon Dioxide (Chalcedony), SiO2

Quartz Boulder (Silicon Dioxide (SiO2)) — mineral

Quartz Boulder

Silicon Dioxide (SiO2)

Slate (Metamorphic Rock (Fine-grained)) — metamorphic

Slate

Metamorphic Rock (Fine-grained)

Pink Quartz (Silicon Dioxide (Quartz), SiO2) — mineral

Pink Quartz

Silicon Dioxide (Quartz), SiO2

Amethyst Geode (Quartz (Silicon Dioxide, SiO2) with iron impurities) — mineral

Amethyst Geode

Quartz (Silicon Dioxide, SiO2) with iron impurities

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Amazonite (Microcline feldspar (KAlSi3O8)) — mineral

Amazonite

Microcline feldspar (KAlSi3O8)

Granite Boulder (Phaneritic Felsic Igneous Rock) — igneous

Granite Boulder

Phaneritic Felsic Igneous Rock

Rugose Coral Fossil (Order Rugosa) — fossil

Rugose Coral Fossil

Order Rugosa

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Selenite (Gypsum (CaSO4·2H2O)) — mineral

Selenite

Gypsum (CaSO4·2H2O)

Limestone Boulder (Sedimentary Rock (Calcium Carbonate, CaCO3)) — sedimentary

Limestone Boulder

Sedimentary Rock (Calcium Carbonate, CaCO3)

Granite Boulder (Intrusive Igneous Rock) — igneous

Granite Boulder

Intrusive Igneous Rock

Sandstone (Sedimentary Rock (Quartzose Sandstone)) — sedimentary

Sandstone

Sedimentary Rock (Quartzose Sandstone)

Limestone (Sedimentary Rock (Primarily Calcium Carbonate, CaCO3)) — sedimentary

Limestone

Sedimentary Rock (Primarily Calcium Carbonate, CaCO3)

Chrysoprase (Silicon Dioxide (Chalcedony variety), SiO2) — gemstone

Chrysoprase

Silicon Dioxide (Chalcedony variety), SiO2

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Fossiliferous Limestone (Calcium Carbonate (CaCO3) with fossil inclusions) — sedimentary

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with fossil inclusions

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Green Aventurine (Quartz (SiO2) with fuchsite inclusions) — mineral

Green Aventurine

Quartz (SiO2) with fuchsite inclusions

Lapis Lazuli (Complex rock composed mainly of lazurite, calcite, and pyrite) — gemstone

Lapis Lazuli

Complex rock composed mainly of lazurite, calcite, and pyrite

Agate (Silicon dioxide (Chalcedony), SiO2) — sedimentary

Agate

Silicon dioxide (Chalcedony), SiO2

Flint (SiO2 (Microcrystalline Quartz / Chert)) — sedimentary

Flint

SiO2 (Microcrystalline Quartz / Chert)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Agate (Silicon Dioxide (Chalcedony), SiO2) — gemstone

Agate

Silicon Dioxide (Chalcedony), SiO2

Red Jasper (Silicon Dioxide (Microcrystalline Quartz) - $SiO_2$) — sedimentary

Red Jasper

Silicon Dioxide (Microcrystalline Quartz) - $SiO_2$

Yellow Calcite (Calcite (CaCO3)) — mineral

Yellow Calcite

Calcite (CaCO3)

Red Jasper with Quartz (Microcrystalline Quartz (SiO2)) — sedimentary

Red Jasper with Quartz

Microcrystalline Quartz (SiO2)

Conglomerate (Conglomerate (Clastic Sedimentary Rock)) — sedimentary

Conglomerate

Conglomerate (Clastic Sedimentary Rock)

Quartz with Epidote (Silicon dioxide (SiO2) with Calcium aluminum iron silicate (Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))) — mineral

Quartz with Epidote

Silicon dioxide (SiO2) with Calcium aluminum iron silicate (Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))

Agate (Silicon Dioxide (Chalcedony), SiO2) — sedimentary

Agate

Silicon Dioxide (Chalcedony), SiO2

Limestone (Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Limestone

Limestone (Calcium Carbonate, CaCO3)

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Red Jasper (Quartz (Microcrystalline silica), SiO2) — sedimentary

Red Jasper

Quartz (Microcrystalline silica), SiO2

Celestite (Celestine (SrSO4)) — mineral

Celestite

Celestine (SrSO4)

Labradorite (Plagioclase Feldspar (Na,Ca)(Al,Si)4O8) — mineral

Labradorite

Plagioclase Feldspar (Na,Ca)(Al,Si)4O8

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Halite (Sodium chloride (NaCl)) — mineral

Halite

Sodium chloride (NaCl)