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

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

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

Chrysoprase

Chalcedony (Silicon Dioxide, SiO2)

Common Opal (Hydrated amorphous silica (SiO2·nH2O)) — mineral

Common Opal

Hydrated amorphous silica (SiO2·nH2O)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Flint (Microcrystalline Quartz (SiO2)) — sedimentary

Flint

Microcrystalline Quartz (SiO2)

Fossil Coral (Hexagonaria / Rugose coral (Fossilized calcium carbonate)) — fossil

Fossil Coral

Hexagonaria / Rugose coral (Fossilized calcium carbonate)

Fossilized Coral (Petoskey Stone or similar Rugose Coral) (Hexagonaria percarinata (or similar Rugose/Tabulate coral)) — fossil

Fossilized Coral (Petoskey Stone or similar Rugose Coral)

Hexagonaria percarinata (or similar Rugose/Tabulate coral)

Fossilized Coral (Rugose coral / Tabulate coral fossil in limestone matrix) — fossil

Fossilized Coral

Rugose coral / Tabulate coral fossil in limestone matrix

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Pumice (Pumice (Volcanic Glass Foam)) — igneous

Pumice

Pumice (Volcanic Glass Foam)

Diorite (Intermediate plutonic igneous rock) — igneous

Diorite

Intermediate plutonic igneous rock

Fossil Coral (Rugose Coral or Tabulate Coral (Phylum Cnidaria)) — fossil

Fossil Coral

Rugose Coral or Tabulate Coral (Phylum Cnidaria)

Jasper Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper Pebble

Microcrystalline Quartz (SiO2)

Fossilized Coral (Rugose or Tabulate Coral) (Phylum Cnidaria, Class Anthozoa (silicified or calcified coral fossil)) — fossil

Fossilized Coral (Rugose or Tabulate Coral)

Phylum Cnidaria, Class Anthozoa (silicified or calcified coral fossil)

Brachiopod Fossil in Sedimentary Rock (Phylum Brachiopoda fossil imprint in sedimentary matrix) — fossil

Brachiopod Fossil in Sedimentary Rock

Phylum Brachiopoda fossil imprint in sedimentary matrix

Fossilized Coral (Hexagonaria (Rugose coral) / Calcium Carbonate (CaCO3)) — fossil

Fossilized Coral

Hexagonaria (Rugose coral) / Calcium Carbonate (CaCO3)

Petoskey Stone / Fossilized Coral (Hexagonaria percarinata) — fossil

Petoskey Stone / Fossilized Coral

Hexagonaria percarinata

Fossilized Coral (Rugosa / Tabulata coral fossils replaced by silica (Chalcedony/Quartz)) — fossil

Fossilized Coral

Rugosa / Tabulata coral fossils replaced by silica (Chalcedony/Quartz)

Fossil Coral (Hexagonaria or similar rugose/tabulate coral fossil (Calcium Carbonate, CaCO3)) — fossil

Fossil Coral

Hexagonaria or similar rugose/tabulate coral fossil (Calcium Carbonate, CaCO3)

Amygdaloidal Basalt (Extrusive mafic igneous rock with amygdules) — igneous

Amygdaloidal Basalt

Extrusive mafic igneous rock with amygdules

Jasper (Microcrystalline quartz (SiO2)) — sedimentary

Jasper

Microcrystalline quartz (SiO2)

Conglomerate (Clastic sedimentary rock (Polymict conglomerate with quartz/calcite matrix)) — sedimentary

Conglomerate

Clastic sedimentary rock (Polymict conglomerate with quartz/calcite matrix)

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Jasper / Quartz Pebble (Silicon dioxide (SiO2) microcrystalline quartz) — sedimentary

Jasper / Quartz Pebble

Silicon dioxide (SiO2) microcrystalline quartz

Copper-bearing Basalt with Epidote and Quartz (Native copper in basalt amygdaloidal matrix) — igneous

Copper-bearing Basalt with Epidote and Quartz

Native copper in basalt amygdaloidal matrix

Porphyritic Basalt or Porphyry (Porphyritic Extrusive Igneous Rock) — igneous

Porphyritic Basalt or Porphyry

Porphyritic Extrusive Igneous Rock

Heart-shaped Quartzite or Sandstone Pebble (Quartz-rich sedimentary rock (Quartzite / Sandstone)) — sedimentary

Heart-shaped Quartzite or Sandstone Pebble

Quartz-rich sedimentary rock (Quartzite / Sandstone)

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Quartzite Pebble (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartzite (SiO2)

Schist (Metamorphic Rock (Mica Schist)) — metamorphic

Schist

Metamorphic Rock (Mica Schist)

Jasper (Microcrystalline Quartz (SiO2) with iron oxide impurities) — sedimentary

Jasper

Microcrystalline Quartz (SiO2) with iron oxide impurities

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Heart-shaped pebble) (Sedimentary Quartz Sandstone) — sedimentary

Sandstone (Heart-shaped pebble)

Sedimentary Quartz Sandstone

Moqui Marble (Hematite-Goethite Concretion) — mineral

Moqui Marble

Hematite-Goethite Concretion

Jasper (Microcrystalline quartz ($SiO_2$)) — sedimentary

Jasper

Microcrystalline quartz ($SiO_2$)

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Fossiliferous Flint (Microcrystalline Quartz (SiO2) with Echinoid Fossil) — sedimentary

Fossiliferous Flint

Microcrystalline Quartz (SiO2) with Echinoid Fossil

Dyed Blue Agate Druzy Pendant (Quartz / Chalcedony (SiO2) with artificial color treatment) — gemstone

Dyed Blue Agate Druzy Pendant

Quartz / Chalcedony (SiO2) with artificial color treatment