Rock Identifier

Community gallery

All rocks & minerals

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

Marble (Recrystallized Carbonate Rock (CaCO3)) — metamorphic

Marble

Recrystallized Carbonate Rock (CaCO3)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Basalt (River Stone)

Basalt (Mafic Extrusive Igneous Rock)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Amygdaloidal Basalt (Amygdaloidal Basalt (Mafic Volcanic Rock)) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Volcanic Rock)

Granitic Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Granitic Gneiss

Gneiss (High-grade metamorphic rock)

Graphic Granite (Pegmatitic Granite (Quartz and Microcline K-Feldspar mixture)) — igneous

Graphic Granite

Pegmatitic Granite (Quartz and Microcline K-Feldspar mixture)

Garnet in Host Rock (Garnet Group (A3B2(SiO4)3)) — metamorphic

Garnet in Host Rock

Garnet Group (A3B2(SiO4)3)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Quartzite cobblestone (Quartzite (primarily SiO2)) — metamorphic

Quartzite cobblestone

Quartzite (primarily SiO2)

Fossilized Rugose Coral (Order Rugosa (Calcium Carbonate - CaCO3)) — sedimentary

Fossilized Rugose Coral

Order Rugosa (Calcium Carbonate - CaCO3)

Calamites (Calamites (Pith cast fossil)) — sedimentary

Calamites

Calamites (Pith cast fossil)

Fossilized Echinoid (Sea Urchin) (Echinoidea (Class) - Often found as Micraster or Clypeaster specimens) — sedimentary

Fossilized Echinoid (Sea Urchin)

Echinoidea (Class) - Often found as Micraster or Clypeaster specimens

Geode (unopened) (Quartz-filled Geode (SiO2)) — sedimentary

Geode (unopened)

Quartz-filled Geode (SiO2)

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Glauconitic Sandstone (Glauconitic Quartz Arenite) — sedimentary

Glauconitic Sandstone

Glauconitic Quartz Arenite

Granite (Phaneritic plutonic rock (Quartzo-feldspathic)) — igneous

Granite

Phaneritic plutonic rock (Quartzo-feldspathic)

Diamond (Cut Gemstone) (Carbon (C)) — mineral

Diamond (Cut Gemstone)

Carbon (C)

Pumice (with oxidation) (Pumice (Vitreous pyroclastic rock)) — igneous

Pumice (with oxidation)

Pumice (Vitreous pyroclastic rock)

Diorite (Diorite) — igneous

Diorite

Diorite

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

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

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Sandstone with Iron Oxide Staining (Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone with Iron Oxide Staining

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Pumice (Pumice (a highly vesicular amorphous silicate)) — igneous

Pumice

Pumice (a highly vesicular amorphous silicate)

Pumice (Pumice (Felsic volcanic rock)) — igneous

Pumice

Pumice (Felsic volcanic rock)

Granite (Phaneritic plutonic igneous rock (SiO2 rich)) — igneous

Granite

Phaneritic plutonic igneous rock (SiO2 rich)

Rose Quartz (Silicon dioxide (SiO2) with trace elements of Titanium, Iron, or Manganese) — mineral

Rose Quartz

Silicon dioxide (SiO2) with trace elements of Titanium, Iron, or Manganese

Dalmatian Stone (Dalmatian Stone (formerly called Dalmatian Jasper)) — igneous

Dalmatian Stone

Dalmatian Stone (formerly called Dalmatian Jasper)

Green Aventurine (Silicon Dioxide (SiO2) with inclusions of Fuchsite) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Red Jasper (Silicon Dioxide with Hematite (SiO2 + Fe2O3)) — sedimentary

Red Jasper

Silicon Dioxide with Hematite (SiO2 + Fe2O3)

Yellow Jasper (Silicon Dioxide with Limonite/Goethite inclusions (SiO2)) — sedimentary

Yellow Jasper

Silicon Dioxide with Limonite/Goethite inclusions (SiO2)

Vesicular Basalt (Scoria) (Basalt with vesicular texture) — igneous

Vesicular Basalt (Scoria)

Basalt with vesicular texture

Greenstone (Metabasalt / Metamorphosed Igneous Rock) — metamorphic

Greenstone

Metabasalt / Metamorphosed Igneous Rock

Basalt (Basalt (containing plagioclase, pyroxene, and olivine)) — igneous

Basalt

Basalt (containing plagioclase, pyroxene, and olivine)

Quartzite Pebbles (Crystalline silica rock (SiO2)) — metamorphic

Quartzite Pebbles

Crystalline silica rock (SiO2)

Granite Pebble (Granite (Phaneritic Igneous Rock)) — igneous

Granite Pebble

Granite (Phaneritic Igneous Rock)