Rock Identifier

Category

Anthropogenic (Man Made Material Processed By Nature)

Browse anthropogenic (man made material processed by nature) specimens identified by the Rock Identifier community.

Olivine in Basalt matrix (Peridotite (Mg, Fe)2SiO4) — igneous

Olivine in Basalt matrix

Peridotite (Mg, Fe)2SiO4

Rough Diamond (Diamond (Native Carbon), C) — mineral

Rough Diamond

Diamond (Native Carbon), C

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

Chert (Chalcedony/Agate)

Microcrystalline Quartz (SiO2)

Chert (specifically Flint or Dark Chalcedony) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Flint or Dark Chalcedony)

Silicon Dioxide (SiO2)

Chert (Nodule) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz (Small fragments) (Silicon Dioxide (SiO2)) — mineral

Quartz (Small fragments)

Silicon Dioxide (SiO2)

Granite (Phaneritic plutonic rock (Quartz + Feldspar + Mica)) — igneous

Granite

Phaneritic plutonic rock (Quartz + Feldspar + Mica)

Rose Quartz with Schist Matrix (Silicon Dioxide (SiO2) with Mica-Schist) — mineral

Rose Quartz with Schist Matrix

Silicon Dioxide (SiO2) with Mica-Schist

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Beach Pebble) (Clastic sedimentary rock (primarily Quartz and Feldspar)) — sedimentary

Sandstone (Beach Pebble)

Clastic sedimentary rock (primarily Quartz and Feldspar)

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

Bituminous Coal (Organic sedimentary rock (humic coal)) — sedimentary

Bituminous Coal

Organic sedimentary rock (humic coal)

Turquoise (Turquoise (Hydrated phosphate of copper and aluminium) - CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Turquoise (Hydrated phosphate of copper and aluminium) - CuAl6(PO4)4(OH)8·4H2O

Sandstone (Red Sandstone) (Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)) — sedimentary

Sandstone (Red Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)

Red Sandstone (Old Red Sandstone) (Ferruginous Sandstone (SiO2 + Fe2O3)) — sedimentary

Red Sandstone (Old Red Sandstone)

Ferruginous Sandstone (SiO2 + Fe2O3)

Shale (Fissile mudrock (composed of clay-sized particles and detrital grains)) — sedimentary

Shale

Fissile mudrock (composed of clay-sized particles and detrital grains)

Sandstone (Micaceous/Feldspathic variant) (Arenite (specifically subarkose or lithic arenite)) — sedimentary

Sandstone (Micaceous/Feldspathic variant)

Arenite (specifically subarkose or lithic arenite)

Sandstone (Ferruginous) (Arenite with Iron Oxide (Fe2O3) cement) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide (Fe2O3) cement

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Ironstone Concretion / Goethite-Hematite Nodule (Goethite/Hematite (α-FeO(OH) / Fe2O3)) — sedimentary

Ironstone Concretion / Goethite-Hematite Nodule

Goethite/Hematite (α-FeO(OH) / Fe2O3)

Sandstone (Quartzose) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (primarily SiO2)

Jasper (Silicon dioxide (SiO2) with iron impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with iron impurities

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Limonite (Iron Ore) (Hydrous Iron Oxide (goethite, lepidocrocite)) — Mineral

Limonite (Iron Ore)

Hydrous Iron Oxide (goethite, lepidocrocite)

Sandstone (Calcareous or Ferruginous) (Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)) — sedimentary

Sandstone (Calcareous or Ferruginous)

Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)

Rough Diamond (Diamond (pure carbon, C)) — mineral

Rough Diamond

Diamond (pure carbon, C)

Red Jasper (Red Jasper (variety of Chalcedony, SiO₂)) — Mineral

Red Jasper

Red Jasper (variety of Chalcedony, SiO₂)

Red Shale (Lutite (primarily composed of Hydrous Aluminum Silicates with Hematite staining)) — sedimentary

Red Shale

Lutite (primarily composed of Hydrous Aluminum Silicates with Hematite staining)

Limestone (Grey and White specimens) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Grey and White specimens)

Calcium Carbonate (CaCO3)

Jasper Marble (Silicon Dioxide (SiO2) with Impurities) — sedimentary

Jasper Marble

Silicon Dioxide (SiO2) with Impurities

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Arenite (a specific type of sandstone with less than 15% matrix)) — Sedimentary rock

Sandstone

Arenite (a specific type of sandstone with less than 15% matrix)

Sedimentary rock

Sandstone (Ferruginous) (Arenite (with Hematite/Limonite cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (with Hematite/Limonite cement)

Yellow Quartz (Citrine Quartz Pebble) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine Quartz Pebble)

Silicon Dioxide (SiO2)

Green Aventurine (Aventurine (a variety of Quartz, SiO2 with fuchsite inclusions)) — Mineral

Green Aventurine

Aventurine (a variety of Quartz, SiO2 with fuchsite inclusions)

Diamond (Carbon (C)) — Mineral

Diamond

Carbon (C)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Sandstone (Quartzose) (Arenite (composed mainly of SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (composed mainly of SiO2)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Fe2O3/FeO(OH) cementing agents)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3/FeO(OH) cementing agents)

Chert (Yellow/Brown variety) (Chert (SiO2)) — sedimentary

Chert (Yellow/Brown variety)

Chert (SiO2)