Rock Identifier

Community gallery

All rocks & minerals

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

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)

Chert (variably Oolitic or Fossiliferous) (Sedimentary Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (variably Oolitic or Fossiliferous)

Sedimentary Cryptocrystalline Quartz (SiO2)

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

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Jasper Pebble (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper Pebble

Silicon Dioxide (SiO2) with iron oxide inclusions

Pink Quartzite (Quartzite (mostly SiO2 with Iron Oxide impurities)) — metamorphic

Pink Quartzite

Quartzite (mostly SiO2 with Iron Oxide impurities)

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)