Rock Identifier

Community gallery

All rocks & minerals

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

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Amygdaloidal Basalt (Amygdaloidal Basalt) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Chalcedony (Chert/Flint)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz-Veined Mudstone (Argillite or Mudstone with Quartz Veining (SiO2 in Siliciclastic Matrix)) — sedimentary

Quartz-Veined Mudstone

Argillite or Mudstone with Quartz Veining (SiO2 in Siliciclastic Matrix)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Quartzite (primarily SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Vesicular Basalt (River Stone) (Basalt (Aphanitic-Vesicular Mafic Rock)) — igneous

Vesicular Basalt (River Stone)

Basalt (Aphanitic-Vesicular Mafic Rock)

Pink Granite (Granite (Phaneritic Acidic Igneous)) — igneous

Pink Granite

Granite (Phaneritic Acidic Igneous)

Aragonite Star Cluster (Aragonite (Calcium Carbonate, CaCO3)) — mineral

Aragonite Star Cluster

Aragonite (Calcium Carbonate, CaCO3)

Porphyry (Porphyritic Rhyolite/Andesite) — igneous

Porphyry

Porphyritic Rhyolite/Andesite

Glaucophane Schist (Blueschist) (Glaucophane Schist) — metamorphic

Glaucophane Schist (Blueschist)

Glaucophane Schist

Glauconitic Sanstone (Glauconite) (Glauconite ((K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)) — sedimentary

Glauconitic Sanstone (Glauconite)

Glauconite ((K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)

Slate (Slate) — metamorphic

Slate

Slate

Greenstone Pebble (Metabasalt (often containing chlorite, actinolite, or epidote)) — metamorphic

Greenstone Pebble

Metabasalt (often containing chlorite, actinolite, or epidote)

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

Basalt (River Stone)

Basalt (Extrusive Igneous Rock)

Green Aventurine (Silicon Dioxide (SiO2+KAl2(AlSi3O10)(OH)2)) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2+KAl2(AlSi3O10)(OH)2)

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

Chert (Flint/Jasper variety)

Silicon Dioxide (SiO2)

Greenstone (Protolith: Basaltic rock) — metamorphic

Greenstone

Protolith: Basaltic rock

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Diorite (Dalmatian Stone variant) (Intermediate Phaneritic Igneous Rock) — igneous

Diorite (Dalmatian Stone variant)

Intermediate Phaneritic Igneous Rock

Basalt (Porphyritic) (Porphyritic Basalt) — igneous

Basalt (Porphyritic)

Porphyritic Basalt

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

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Pink Quartz (Silicon Dioxide (SiO2) with trace inclusions) — mineral

Pink Quartz

Silicon Dioxide (SiO2) with trace inclusions

Pink Himalayan Salt Rock (Halite) (Halite (Sodium Chloride, NaCl)) — mineral

Pink Himalayan Salt Rock (Halite)

Halite (Sodium Chloride, NaCl)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

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

Green Aventurine

SiO2 (Quartz with Fuchsite inclusions)

Quartzite pebble (Quartzite (SiO2)) — metamorphic

Quartzite pebble

Quartzite (SiO2)

Peridot (Olivine) (Olivine ((Mg, Fe)2SiO4)) — mineral

Peridot (Olivine)

Olivine ((Mg, Fe)2SiO4)

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

Green Aventurine

Aventurine Quartz (SiO2 with inclusions of Fuchsite mica)

Nephrite Jade (Tremolite-Actinolite solid solution Ca2(Mg, Fe)5Si8O22(OH)2) — metamorphic

Nephrite Jade

Tremolite-Actinolite solid solution Ca2(Mg, Fe)5Si8O22(OH)2

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

Chert (or Flint)

Microcrystalline Quartz (SiO2)

Fossiliferous Limestone (Biogenic Limestone (CaCO3)) — sedimentary

Fossiliferous Limestone

Biogenic Limestone (CaCO3)

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

Fossiliferous Limestone

Limestone (Calcium Carbonate, CaCO3)

Basalt (Aphanitic Mafic Igneous Rock) — igneous

Basalt

Aphanitic Mafic Igneous Rock

Chert (often called Flint when dark) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert with Limestone matrix (Microcrystalline silica (SiO2) in Calcite (CaCO3) matrix) — sedimentary

Chert with Limestone matrix

Microcrystalline silica (SiO2) in Calcite (CaCO3) matrix

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

Chert (or Flint)

Microcrystalline Quartz (SiO2)

Fossil Plant Impression (Calamites) (Calamites sp. (Tracheophyta: Equisetopsida)) — sedimentary

Fossil Plant Impression (Calamites)

Calamites sp. (Tracheophyta: Equisetopsida)

Calamites (Fossil Plant) (Calamites (Genus), belonging to the class Equisetopsida) — sedimentary

Calamites (Fossil Plant)

Calamites (Genus), belonging to the class Equisetopsida