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

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Sodalite (Na4Al3(SiO4)3Cl (Sodium Aluminum Silicate Chloride)) — mineral

Sodalite

Na4Al3(SiO4)3Cl (Sodium Aluminum Silicate Chloride)

Amygdaloidal Basalt (Vesicular Basalt with Amygdules) — igneous

Amygdaloidal Basalt

Vesicular Basalt with Amygdules

Amethyst Cluster Pendant (Silicon Dioxide (SiO2) - Quartz variety Amethyst) — gemstone

Amethyst Cluster Pendant

Silicon Dioxide (SiO2) - Quartz variety Amethyst

Quartzite Pebble (Metamorphic Quartzite) — metamorphic

Quartzite Pebble

Metamorphic Quartzite

Fossilized Shark Tooth (Chondrichthyes (class) fossilized tooth) — fossil

Fossilized Shark Tooth

Chondrichthyes (class) fossilized tooth

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

Sandstone

Sedimentary rock composed mainly of sand-sized minerals or rock grains

River Pebble (Weathered Sedimentary Rock Fragment) — sedimentary

River Pebble

Weathered Sedimentary Rock Fragment

Sandstone Pebble (Sedimentary Rock (Quartz Arenite)) — sedimentary

Sandstone Pebble

Sedimentary Rock (Quartz Arenite)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Red Breccia Jasper (Silicon Dioxide (SiO2) with hematite and various mineral inclusions) — sedimentary

Red Breccia Jasper

Silicon Dioxide (SiO2) with hematite and various mineral inclusions

Shale (Sedimentary pelitic rock) — sedimentary

Shale

Sedimentary pelitic rock

Dyed Agate (Chalcedony (SiO2)) — gemstone

Dyed Agate

Chalcedony (SiO2)

Chert / Flint Handaxe (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Flint Handaxe

Cryptocrystalline Quartz (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Chert / Flint (Artifact) (Microcrystalline quartz (SiO2)) — sedimentary

Chert / Flint (Artifact)

Microcrystalline quartz (SiO2)

Pyrite Schist (Metamorphic rock containing FeS2 (Pyrite) with mica and quartz) — metamorphic

Pyrite Schist

Metamorphic rock containing FeS2 (Pyrite) with mica and quartz

Quartz pebble (Silicon dioxide (SiO2)) — sedimentary

Quartz pebble

Silicon dioxide (SiO2)

Jasper Pebble (Microcrystalline Quartz (Chalcedony), SiO2) — sedimentary

Jasper Pebble

Microcrystalline Quartz (Chalcedony), SiO2

Pumice (Pumice (Volcanic glass / Felsic extrusive rock)) — igneous

Pumice

Pumice (Volcanic glass / Felsic extrusive rock)

Fossilized Bark (Lepidodendron / Sigillaria fossil impression) — fossil

Fossilized Bark

Lepidodendron / Sigillaria fossil impression

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Fairy Stone (Staurolite Cross) (Staurolite (Fe2Al9O6(SiO4)4(O,OH)2)) — mineral

Fairy Stone (Staurolite Cross)

Staurolite (Fe2Al9O6(SiO4)4(O,OH)2)

Chert / Flint Tool (Cryptocrystalline quartz (SiO2)) — sedimentary

Chert / Flint Tool

Cryptocrystalline quartz (SiO2)

Chert / Flint (Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)) — sedimentary

Chert / Flint

Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)

Heart-shaped Jasper / Chert Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Heart-shaped Jasper / Chert Pebble

Microcrystalline Quartz (SiO2)

Conglomerate (Sedimentary Conglomerate) — sedimentary

Conglomerate

Sedimentary Conglomerate

Limonite or Ironstone (Hydrated iron oxide-hydroxide, approximately FeO(OH)·n(H2O)) — mineral

Limonite or Ironstone

Hydrated iron oxide-hydroxide, approximately FeO(OH)·n(H2O)

Chert / Flint (Cryptocrystalline quartz (SiO2)) — sedimentary

Chert / Flint

Cryptocrystalline quartz (SiO2)

Limonite (FeO(OH)·nH2O) — mineral

Limonite

FeO(OH)·nH2O

Tiger's Eye (Quartz pseudomorph after crocidolite (SiO2)) — gemstone

Tiger's Eye

Quartz pseudomorph after crocidolite (SiO2)

Shark Tooth Fossil (Vertebrate fossilized tooth) — fossil

Shark Tooth Fossil

Vertebrate fossilized tooth

Spinel (Magnesium aluminum oxide (MgAl2O4)) — gemstone

Spinel

Magnesium aluminum oxide (MgAl2O4)

Shark Tooth Fossil (Vertebrate fossilized tooth (various genera such as Carcharodon, Otodus, or Negaprion)) — fossil

Shark Tooth Fossil

Vertebrate fossilized tooth (various genera such as Carcharodon, Otodus, or Negaprion)

Native Copper (Copper (Cu)) — mineral

Native Copper

Copper (Cu)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Crinoid Stem Fossil (Crinoida (columnal ossicles)) — fossil

Crinoid Stem Fossil

Crinoida (columnal ossicles)

Fossil Shark Tooth (Selachii (fossilized dentition)) — fossil

Fossil Shark Tooth

Selachii (fossilized dentition)

Chrysocolla in Matrix (Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla in Matrix

Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O