Rock Identifier

Community gallery

All rocks & minerals

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

Pyrite (Iron Pyrite) (Iron Sulfide (FeS2)) — mineral

Pyrite (Iron Pyrite)

Iron Sulfide (FeS2)

Sandstone (Ferruginous) (Arenite (with Iron Oxide cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (with Iron Oxide cement)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Sandstone with Quartz Veining (Arenite with SiO2 veins) — sedimentary

Sandstone with Quartz Veining

Arenite with SiO2 veins

Quartz-bearing Ore (likely Gold-bearing Quartz) (Quartz (SiO2) with potential sulfide mineralization (Pyrite/Arsenopyrite)) — mineral/hydrothermal

Quartz-bearing Ore (likely Gold-bearing Quartz)

Quartz (SiO2) with potential sulfide mineralization (Pyrite/Arsenopyrite)

mineral/hydrothermal

Chert (with Limestone/Marble traces) (Silicon Dioxide (SiO2) / Microcrystalline Quartz) — sedimentary

Chert (with Limestone/Marble traces)

Silicon Dioxide (SiO2) / Microcrystalline Quartz

Gold-bearing Quartz (Auriferous Quartz (SiO2 with native Au)) — mineral

Gold-bearing Quartz

Auriferous Quartz (SiO2 with native Au)

Chert (Chocolate or Brown Flint) (Chert (SiO2)) — sedimentary

Chert (Chocolate or Brown Flint)

Chert (SiO2)

Diorite with Xenolith (Intermediate Plutonic Igneous Rock (Diorite)) — igneous

Diorite with Xenolith

Intermediate Plutonic Igneous Rock (Diorite)

Flint (Chert Node) (Silicon Dioxide (SiO2)) — sedimentary

Flint (Chert Node)

Silicon Dioxide (SiO2)

Scoria (Lava Rock) (Vesicular Basalt / Scoria) — igneous

Scoria (Lava Rock)

Vesicular Basalt / Scoria

Iron Slag (Ferrous Slag (Industrial Byproduct)) — mineraloid (anthropogenic byproduct)

Iron Slag

Ferrous Slag (Industrial Byproduct)

mineraloid (anthropogenic byproduct)

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

Vesicular Basalt

Basalt (Mafic volcanic rock)

Sandstone (with vugs or solution cavities) (Arenite (primarily Quartz and Feldspar with CaCO3 or SiO2 cement)) — sedimentary

Sandstone (with vugs or solution cavities)

Arenite (primarily Quartz and Feldspar with CaCO3 or SiO2 cement)

Sandstone (with vugs) (Arenite / Sedimentary Sandstone) — sedimentary

Sandstone (with vugs)

Arenite / Sedimentary Sandstone

Tufa (Calcareous Tufa) (Calcareous Tufa (Precipitated CaCO3)) — sedimentary

Tufa (Calcareous Tufa)

Calcareous Tufa (Precipitated CaCO3)

Concretionary Sandstone (Clastic Sedimentary Rock (Sandstone with secondary mineral cementation)) — sedimentary

Concretionary Sandstone

Clastic Sedimentary Rock (Sandstone with secondary mineral cementation)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Fossiliferous Limestone (Limestone (CaCO3 with Bioclasts)) — sedimentary

Fossiliferous Limestone

Limestone (CaCO3 with Bioclasts)

Chert (Chert (SiO2)) — sedimentary

Chert

Chert (SiO2)

Scoria (Highly vesicular mafic volcanic rock) — igneous

Scoria

Highly vesicular mafic volcanic rock

Epidote ({Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)) — mineral

Epidote

{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Serpentinite (Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)) — metamorphic

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)

Chert / Chalcedony (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / Chalcedony

Microcrystalline Quartz (SiO2)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Amazonite (Microcline (KAlSi3O8) with lead impurities) — mineral

Amazonite

Microcline (KAlSi3O8) with lead impurities

Larimar (Pectolite (NaCa2Si3O8(OH))) — mineral

Larimar

Pectolite (NaCa2Si3O8(OH))

Satin Spar (often marketed as Selenite) (Gypsum (CaSO4·2H2O)) — mineral

Satin Spar (often marketed as Selenite)

Gypsum (CaSO4·2H2O)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Tiger's Eye (Silicon Dioxide (SiO2) with fibrous inclusions) — mineral

Tiger's Eye

Silicon Dioxide (SiO2) with fibrous inclusions

Sheen Obsidian (Volcanic glass (SiO2 with inclusions)) — igneous

Sheen Obsidian

Volcanic glass (SiO2 with inclusions)

Sodalite (Sodalite (Na8Al6Si6O24Cl2)) — mineral

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Lapis Lazuli (Lapis Lazuli (Rock containing Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)) — metamorphic

Lapis Lazuli

Lapis Lazuli (Rock containing Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Green Aventurine (Silicon dioxide (SiO2) with Fuchsite inclusions) — mineral

Green Aventurine

Silicon dioxide (SiO2) with Fuchsite inclusions

Bloodstone / Heliotrope (Cryptocrystalline Quartz (SiO2 with inclusions)) — sedimentary

Bloodstone / Heliotrope

Cryptocrystalline Quartz (SiO2 with inclusions)

Kambaba Jasper (Stromatolite (Fossilized Algae)) — sedimentary

Kambaba Jasper

Stromatolite (Fossilized Algae)

Quartzite (with possible Iron staining) (Meta-orthoquartzite (primarily SiO2)) — metamorphic

Quartzite (with possible Iron staining)

Meta-orthoquartzite (primarily SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Sandstone with Iron Banding (Arenite with Hematite or Limonite staining (SiO2 with Fe2O3)) — sedimentary

Sandstone with Iron Banding

Arenite with Hematite or Limonite staining (SiO2 with Fe2O3)

Quartz Vein in Host Rock (Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix) — metamorphic

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix

Basalt River Pebble (Extrusive Mafic Basalt) — igneous

Basalt River Pebble

Extrusive Mafic Basalt

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

Chert (Flint)

Microcrystalline Quartz (SiO2)