Rock Identifier

Category

Man Made

Browse man made specimens identified by the Rock Identifier community.

Learn about Man Made in the encyclopedia

Opalite

Goldstone

Blue Goldstone

Zincite

Map Jasper

Mandarin Garnet

Mandarin Garnet

Andalusite

Marl

Dunite

Coquina

Dalmatian Jasper

Dalmatian Jasper

Chalk

Oolitic Limestone (Oosparite / Oolitic Calcarenite (CaCO3)) — sedimentary

Oolitic Limestone

Oosparite / Oolitic Calcarenite (CaCO3)

Tiger's Eye (Silicon dioxide (SiO2) with inclusions of Limonite) — metamorphic

Tiger's Eye

Silicon dioxide (SiO2) with inclusions of Limonite

Red Sandstone (Ferruginous Sandstone) — sedimentary

Red Sandstone

Ferruginous Sandstone

Fluorite (Fluor-spar) (Calcium Fluoride (CaF2)) — mineral

Fluorite (Fluor-spar)

Calcium Fluoride (CaF2)

Red Jasper (with Chert/Quartz) (Silicon Dioxide (SiO2)) — sedimentary

Red Jasper (with Chert/Quartz)

Silicon Dioxide (SiO2)

Jasper (Jasper (Silicon Dioxide, SiO2)) — Mineral

Jasper

Jasper (Silicon Dioxide, SiO2)

Sodalite in Matrix (often called Blue Marble or Sodalite-Syenite) (Sodalite-bearing Syenite / Na8Al6Si6O24Cl2 (Sodalite component)) — igneous

Sodalite in Matrix (often called Blue Marble or Sodalite-Syenite)

Sodalite-bearing Syenite / Na8Al6Si6O24Cl2 (Sodalite component)

Agate (Silicon dioxide (SiO2)) — mineral

Agate

Silicon dioxide (SiO2)

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Obsidian (Volcanic Glass (SiO2 rich)) — igneous

Obsidian

Volcanic Glass (SiO2 rich)

Fluorite in Host Rock (Calcium Fluoride (CaF2)) — mineral

Fluorite in Host Rock

Calcium Fluoride (CaF2)

Red Sandstone (Arenite (predominantly Quartz with Hematite cementation)) — sedimentary

Red Sandstone

Arenite (predominantly Quartz with Hematite cementation)

Quartzite (River Cobble) (Quartzite (predominantly SiO2)) — metamorphic

Quartzite (River Cobble)

Quartzite (predominantly SiO2)

Chert (Agate/Flint variant) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Agate/Flint variant)

Microcrystalline Quartz (SiO2)

Fluorite Octahedron (Fluorite (Calcium Fluoride, CaF2)) — mineral

Fluorite Octahedron

Fluorite (Calcium Fluoride, CaF2)

Jasper pebble (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary (secondary classification: cryptocrystalline quartz)

Jasper pebble

Silicon dioxide (SiO2) with iron oxide inclusions

sedimentary (secondary classification: cryptocrystalline quartz)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Chalcanthite (Hydrated copper(II) sulfate (CuSO4·5H2O)) — mineral

Chalcanthite

Hydrated copper(II) sulfate (CuSO4·5H2O)

Quartzite Pebble (SiO2 (Silicon Dioxide)) — metamorphic

Quartzite Pebble

SiO2 (Silicon Dioxide)

Coral Fossil (Favosites) (Favosites (Calcite/Calcium Carbonate, CaCO3)) — sedimentary

Coral Fossil (Favosites)

Favosites (Calcite/Calcium Carbonate, CaCO3)

Rhyolite (Rhyolite (High-silica volcanic rock)) — igneous

Rhyolite

Rhyolite (High-silica volcanic rock)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Iron Meteorite (Siderite (Meteoric Iron-Nickel alloy)) — igneous

Iron Meteorite

Siderite (Meteoric Iron-Nickel alloy)

Conglomerate (Conglomerate (Sedimentary Rock)) — sedimentary

Conglomerate

Conglomerate (Sedimentary Rock)

Sandstone (Sandstone (clastic sedimentary rock)) — sedimentary

Sandstone

Sandstone (clastic sedimentary rock)

Onyx Marble (also commonly called Onyx) (Calcite (CaCO3), often with other mineral impurities) — Sedimentary Rock (specifically a type of Travertine)

Onyx Marble (also commonly called Onyx)

Calcite (CaCO3), often with other mineral impurities

Sedimentary Rock (specifically a type of Travertine)

Basalt (Basalt (Mafic Extrusive Rock)) — igneous

Basalt

Basalt (Mafic Extrusive Rock)

Basalt (Greenstone) (Extrusive mafic igneous rock) — igneous

Basalt (Greenstone)

Extrusive mafic igneous rock

Granular Sandstone (Arenite (variable composition, primarily SiO2)) — sedimentary

Granular Sandstone

Arenite (variable composition, primarily SiO2)

Sandstone (Ferruginous) (Arenite (SiO2 with iron oxide impurities)) — sedimentary

Sandstone (Ferruginous)

Arenite (SiO2 with iron oxide impurities)

Sandstone (Red/Brown Variety) (Arenite (SiO2 with iron oxide impurities)) — sedimentary

Sandstone (Red/Brown Variety)

Arenite (SiO2 with iron oxide impurities)

Feldspar (specifically Orthoclase) (Potassium Aluminum Silicate (KAlSi3O8)) — mineral

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

Olivine Diabase (Microgabbro) (Diabase or Dolerite with Olivine) — igneous

Olivine Diabase (Microgabbro)

Diabase or Dolerite with Olivine

Quartz (Orangey-Yellow variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Orangey-Yellow variety)

Silicon Dioxide (SiO2)

Greenstone / Greenschist (Greenschist (composed of Chlorite, Epidote, and Actinolite)) — metamorphic

Greenstone / Greenschist

Greenschist (composed of Chlorite, Epidote, and Actinolite)

Rugose Coral (Horn Coral) Fossil (Order Rugosa (likely Grewingkia or Zaphrentis genus)) — fossil

Rugose Coral (Horn Coral) Fossil

Order Rugosa (likely Grewingkia or Zaphrentis genus)

Green Fluorite (Fluorite (Calcium Fluoride, CaF2)) — mineral

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Ruby in Fuchsite (often confused with Ruby in Zoisite) (Corundum (Al2O3) in Chromium-rich Muscovite (KAl2(AlSi3O10)(OH)2)) — metamorphic

Ruby in Fuchsite (often confused with Ruby in Zoisite)

Corundum (Al2O3) in Chromium-rich Muscovite (KAl2(AlSi3O10)(OH)2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Pink Feldspar (Orthoclase) (Orthoclase Feldspar (KAlSi3O8)) — mineral

Pink Feldspar (Orthoclase)

Orthoclase Feldspar (KAlSi3O8)

Sandstone (Clastic Sedimentary Rock (composed mostly of SiO2)) — sedimentary

Sandstone

Clastic Sedimentary Rock (composed mostly of SiO2)