Rock Identifier

Community gallery

All rocks & minerals

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

Lapis Lazuli (in Matrix) (Lazurite-bearing Metamorphic Rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2) — metamorphic

Lapis Lazuli (in Matrix)

Lazurite-bearing Metamorphic Rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

Unakite (Unakite (Epidotized Granite)) — metamorphic

Unakite

Unakite (Epidotized Granite)

Basalt or Siltstone Pebbles (Mafic volcanic rock (Basalt) or Indurated Siltstone) — igneous or sedimentary

Basalt or Siltstone Pebbles

Mafic volcanic rock (Basalt) or Indurated Siltstone

igneous or sedimentary

Basalt Pebble (Basalt (Mafic volcanic rock)) — igneous

Basalt Pebble

Basalt (Mafic volcanic rock)

Basalt (River Pebble) (Mafic volcanic rock (rich in magnesium and iron)) — igneous

Basalt (River Pebble)

Mafic volcanic rock (rich in magnesium and iron)

Granitoid (Pegmatitic Granite) (Granitoid with dominant Potassium Feldspar and Quartz) — igneous

Granitoid (Pegmatitic Granite)

Granitoid with dominant Potassium Feldspar and Quartz

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Ironstone Concretion (Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)) — sedimentary

Ironstone Concretion

Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

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

Satin Spar (Satin Spar Selenite)

Gypsum (CaSO4·2H2O)

Satin Spar Selenite (Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)) — mineral

Satin Spar Selenite

Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)

Amber (Baltic) (Succinith (Fossilized Tree Resin)) — mineraloid

Amber (Baltic)

Succinith (Fossilized Tree Resin)

Belemnite (Fossilized Rostrum) (Belemnitida (order), specifically Neohibolites or similar genera depending on age) — sedimentary

Belemnite (Fossilized Rostrum)

Belemnitida (order), specifically Neohibolites or similar genera depending on age

Yellow Sapphire (Corundum (Al2O3)) — mineral

Yellow Sapphire

Corundum (Al2O3)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Quartzite Pebble (Quartzite (mostly SiO2)) — metamorphic

Quartzite Pebble

Quartzite (mostly SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Unakite Epidosite Pebble (Epidotized Granite (Epidote-Albite-Quartz)) — metamorphic

Unakite Epidosite Pebble

Epidotized Granite (Epidote-Albite-Quartz)

Unakite (Unakite (Epidotized Granite)) — metamorphic

Unakite

Unakite (Epidotized Granite)

Granite Cobble (Phaneritic Felsic Igneous Rock) — igneous

Granite Cobble

Phaneritic Felsic Igneous Rock

Green Tourmaline (Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)) — mineral

Green Tourmaline

Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)

Basalt (Weathered River Stone) (Extrusive Mafic Igneous Rock) — igneous

Basalt (Weathered River Stone)

Extrusive Mafic Igneous Rock

Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

Scoria (Scoriaceous Basalt) — igneous

Scoria

Scoriaceous Basalt

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Fossil Coral (Rugose) (Rugosa (Order), often preserved in Limestone (CaCO3)) — sedimentary

Fossil Coral (Rugose)

Rugosa (Order), often preserved in Limestone (CaCO3)

Chert (Brown Variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Brown Variety)

Microcrystalline Quartz (SiO2)

Sandstone (Clastic sedimentary rock (SiO2 primary)) — sedimentary

Sandstone

Clastic sedimentary rock (SiO2 primary)

Chert (Common Opal or Chalcedony) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Common Opal or Chalcedony)

Microcrystalline Quartz (SiO2)

Chert (Flint) (Microcrystalline silica (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline silica (SiO2)

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

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Ferruginous Sandstone Pebble (Arenite with Iron Oxide matrix) — sedimentary

Ferruginous Sandstone Pebble

Arenite with Iron Oxide matrix

Gray Quartzite with Quartz Veining (Metamorphosed Quartz-rich Sandstone) — metamorphic

Gray Quartzite with Quartz Veining

Metamorphosed Quartz-rich Sandstone

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Basalt with Quartz Vein (Basalt (extrusive igneous rock) with Quartz (SiO2) inclusion) — igneous

Basalt with Quartz Vein

Basalt (extrusive igneous rock) with Quartz (SiO2) inclusion

Jasper (Silicon dioxide (Microcrystalline Quartz, SiO2)) — sedimentary

Jasper

Silicon dioxide (Microcrystalline Quartz, SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

White Opal (Hydrated Silica (SiO2·nH2O)) — mineral

White Opal

Hydrated Silica (SiO2·nH2O)

Chert (Jasper variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Red Sandstone (Arenite (specifically Quartz Arenite with Iron Oxide)) — sedimentary

Red Sandstone

Arenite (specifically Quartz Arenite with Iron Oxide)

Fossiliferous Limestone (Crinoidal Limestone) (Calcium Carbonate with Crinoid Stem Fossils (CaCO3)) — sedimentary

Fossiliferous Limestone (Crinoidal Limestone)

Calcium Carbonate with Crinoid Stem Fossils (CaCO3)

Chert (Siltstone-Chert mixture) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Siltstone-Chert mixture)

Microcrystalline Quartz (SiO2)