Rock Identifier

Community gallery

All rocks & minerals

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

Hematite Nodular Concretion (Iron(III) oxide (Fe2O3)) — mineral

Hematite Nodular Concretion

Iron(III) oxide (Fe2O3)

Conglomerate (Conglomerate (Clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (Clastic sedimentary rock)

Chert (Jasper/Agate variety) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Agate variety)

Cryptocrystalline Quartz (SiO2)

Quartzite (Tumbled) (Recrystallized Quartz (SiO2)) — metamorphic

Quartzite (Tumbled)

Recrystallized Quartz (SiO2)

Serpentine (Serpentinite (group of hydrous magnesium iron phyllosilicate minerals, e.g., Lizardite, Antigorite)) — metamorphic

Serpentine

Serpentinite (group of hydrous magnesium iron phyllosilicate minerals, e.g., Lizardite, Antigorite)

Conglomerate (Clastic Sedimentary Conglomerate) — sedimentary

Conglomerate

Clastic Sedimentary Conglomerate

Diorite (River Cobble) (Phaneritic intermediate plutonic rock) — igneous

Diorite (River Cobble)

Phaneritic intermediate plutonic rock

$Ptygmatic Migmatite (Migmatite (consisting of Neosome and Paleosome fractions)) — metamorphic$

Ptygmatic Migmatite

Migmatite (consisting of Neosome and Paleosome fractions)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Porphyritic Basalt (Porphyritic Mafic Volcanic Rock) — igneous

Porphyritic Basalt

Porphyritic Mafic Volcanic Rock

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Milky Quartz Cobble (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz Cobble

Quartz (Silicon Dioxide, SiO2)

Green Aventurine (Aventurine Quartz (SiO2 with Fuchsite inclusions)) — mineral

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Alkali Feldspar Granite (Alkali Feldspar Granite (KAlSi3O8)) — igneous

Alkali Feldspar Granite

Alkali Feldspar Granite (KAlSi3O8)

Moonstone (Orthoclase feldspar (KAlSi3O8)) — mineral

Moonstone

Orthoclase feldspar (KAlSi3O8)

Black Tourmaline (Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)) — mineral

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Ruby (Corundum (Al2O3)) — mineral

Ruby

Corundum (Al2O3)

Red Jasper (Silicon Dioxide (SiO2)) — sedimentary

Red Jasper

Silicon Dioxide (SiO2)

Chert (White Chert/Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (White Chert/Flint)

Silicon Dioxide (SiO2)

Green Aventurine (Quartz (with Fuchsite inclusions) - SiO2) — mineral

Green Aventurine

Quartz (with Fuchsite inclusions) - SiO2

Jadeite (Jade Ring) (NaAlSi2O6 (Sodium Aluminum Silicate)) — metamorphic

Jadeite (Jade Ring)

NaAlSi2O6 (Sodium Aluminum Silicate)

Red Jasper (Silicon Dioxide (SiO2) with Iron inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron inclusions

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

Brown Jasper (Chert)

Silicon Dioxide (SiO2)

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

Gneiss

Gneiss (High-grade metamorphic rock)

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

Banded Gneiss

Gneiss (High-grade metamorphic rock)

Limonite/Goethite Concretion (Hydrated Iron(III) Oxide-hydroxide (FeO(OH)·nH2O)) — sedimentary

Limonite/Goethite Concretion

Hydrated Iron(III) Oxide-hydroxide (FeO(OH)·nH2O)

Chert (River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

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

Granite River Pebble

Phaneritic Felsic Igneous Rock (Granite)

River Stone (Grey Andesite) (Intermediate extrusive volcanic rock (Andesite)) — igneous

River Stone (Grey Andesite)

Intermediate extrusive volcanic rock (Andesite)

River Pebble (Greywacke or Chert mix) (Silicon Dioxide (SiO2) with varying mineral impurities) — sedimentary

River Pebble (Greywacke or Chert mix)

Silicon Dioxide (SiO2) with varying mineral impurities

Milky Quartz with Iron Oxide (Quartz (Silicon Dioxide, SiO2) with Limonite/Goethite staining) — mineral

Milky Quartz with Iron Oxide

Quartz (Silicon Dioxide, SiO2) with Limonite/Goethite staining

Ferruginous Quartz (Silicon Dioxide (SiO2) with Hematite/Limonite impurities) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Red Jasper (Silicon Dioxide (SiO2)) — sedimentary

Red Jasper

Silicon Dioxide (SiO2)

Chert (Nodule) (Chert (Silicon dioxide, SiO2)) — sedimentary

Chert (Nodule)

Chert (Silicon dioxide, SiO2)

Fossilized Tabulate Coral (Honeycomb Coral) (Favosites (Order: Tabulata)) — sedimentary

Fossilized Tabulate Coral (Honeycomb Coral)

Favosites (Order: Tabulata)

Petoskey Stone (Hexagonaria percarinata (Fossilized Rugose Coral)) — sedimentary

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Ironstone Concretion (Siderite or Goethite Concretion) — sedimentary

Ironstone Concretion

Siderite or Goethite Concretion

Fossilized Bone (Petrified Bone) (Permineralized Vertebrate Remains) — sedimentary

Fossilized Bone (Petrified Bone)

Permineralized Vertebrate Remains

Fossilized Bone (Permineralized Vertebrate Fossil) — sedimentary

Fossilized Bone

Permineralized Vertebrate Fossil

Chert with Crinoid Fossil Impression (Microcrystalline Quartz (SiO2) with Crinoidea fossil impression) — sedimentary

Chert with Crinoid Fossil Impression

Microcrystalline Quartz (SiO2) with Crinoidea fossil impression

Sandstone (with potential iron mineralization) (Arenite) — sedimentary

Sandstone (with potential iron mineralization)

Arenite