Rock Identifier

Category

Rock

Browse rock specimens identified by the Rock Identifier community.

Learn about Rock in the encyclopedia

Rock Gypsum

Coral Rock

Asphalt Rock

Rock Salt

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Anorthosite

Cataclasite

Peridotite

Phosphorite

Gondite

Dunite

Crinoid Stem Fossil (Class Crinoidea (Sea Lilies)) — sedimentary

Crinoid Stem Fossil

Class Crinoidea (Sea Lilies)

Quartz vein in Schist (Crystalline Silicon Dioxide (SiO2) in Metamorphic Host) — metamorphic

Quartz vein in Schist

Crystalline Silicon Dioxide (SiO2) in Metamorphic Host

Sandstone (Quartzite Pebble) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzite Pebble)

Arenite (primarily SiO2)

Clear Quartz (Tumbled) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Tumbled)

Silicon Dioxide (SiO2)

Septarian Nodule (Septarian Concretion (CaCO3 with Siderite/Limonite streaks)) — sedimentary

Septarian Nodule

Septarian Concretion (CaCO3 with Siderite/Limonite streaks)

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

Chert (Jasper)

Silicon Dioxide (SiO2)

Milky Quartz with Mineral Inclusions (Silicon Dioxide (SiO2) with miscellaneous inclusions) — mineral

Milky Quartz with Mineral Inclusions

Silicon Dioxide (SiO2) with miscellaneous inclusions

Milky Quartz Pebble (Iron-Stained) (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble (Iron-Stained)

Silicon Dioxide (SiO2)

Quartz / Quartzite (Silicon Dioxide (SiO2)) — mineral / metamorphic

Quartz / Quartzite

Silicon Dioxide (SiO2)

mineral / metamorphic

Quartz (Chert/Chalcedony variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

Carnelian (Red Chalcedony) (SiO2 (Silicon Dioxide) with Iron Oxide impurities) — mineral

Carnelian (Red Chalcedony)

SiO2 (Silicon Dioxide) with Iron Oxide impurities

Porphyry (Porphyritic Rhyolite/Andesite) — igneous

Porphyry

Porphyritic Rhyolite/Andesite

Mixed Tumbled Stones Collection (Mixed Silicates and Carbonates (Quartz, Amorphous Silica, Carbonates)) — multiple

Mixed Tumbled Stones Collection

Mixed Silicates and Carbonates (Quartz, Amorphous Silica, Carbonates)

Concretion in Shale (Siltstone/Shale with Siderite or Calcareous concretions) — sedimentary

Concretion in Shale

Siltstone/Shale with Siderite or Calcareous concretions

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Geode (Chert/Quartz) (Silicon Dioxide (SiO2)) — sedimentary

Geode (Chert/Quartz)

Silicon Dioxide (SiO2)

Basalt (Basalt (Mafic igneous rock)) — igneous

Basalt

Basalt (Mafic igneous rock)

Sandstone (Quartzose) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Gabbro (Gabbro) — igneous

Gabbro

Gabbro

Serpentine (Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4)) — metamorphic

Serpentine

Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4)

Serpentine (Serpentine Group (Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4) — metamorphic

Serpentine

Serpentine Group (Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4

Unakite (Unakite (metamorphosed granite)) — metamorphic

Unakite

Unakite (metamorphosed granite)

Shale (Sedimentary rock composed of clay minerals and quartz) — sedimentary

Shale

Sedimentary rock composed of clay minerals and quartz

Unakite (Unakite Epidosite) — metamorphic

Unakite

Unakite Epidosite

Granite / Diorite (Granodiorite) (Granodiorite / Quartz Diorite) — igneous

Granite / Diorite (Granodiorite)

Granodiorite / Quartz Diorite

Serpentine (Antigorite/Chrysotile/Lizardite mix - Mg3Si2O5(OH)4) — metamorphic

Serpentine

Antigorite/Chrysotile/Lizardite mix - Mg3Si2O5(OH)4

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

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Basalt (Vesicular or Weathered) (Aphanitic Mafic Igneous Rock (Basalt)) — igneous

Basalt (Vesicular or Weathered)

Aphanitic Mafic Igneous Rock (Basalt)

Pink Granite (Phaneritic Igneous Rock (Quartz-Feldspar-Mica)) — igneous

Pink Granite

Phaneritic Igneous Rock (Quartz-Feldspar-Mica)

Unakite Jasper (Epidotized Granite) — metamorphic

Unakite Jasper

Epidotized Granite

Banded Agate (Cryptocrystalline Quartz (SiO2) with iron oxide inclusions) — mineral

Banded Agate

Cryptocrystalline Quartz (SiO2) with iron oxide inclusions

Quartz Crystal Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

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

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Serpentinite (Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)) — metamorphic

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)

Banded Siltstone (Siltstone with planar bedding) — sedimentary

Banded Siltstone

Siltstone with planar bedding

Lake Superior Agate (Silicon Dioxide (SiO2)) — mineral

Lake Superior Agate

Silicon Dioxide (SiO2)

Unakite (Epidotized Granite) — metamorphic

Unakite

Epidotized Granite

Serpentinite (Serpentinite (composed largely of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile: Mg3Si2O5(OH)4)) — metamorphic

Serpentinite

Serpentinite (composed largely of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile: Mg3Si2O5(OH)4)

Unakite (Unakite (Epidotized Granite)) — metamorphic

Unakite

Unakite (Epidotized Granite)