Rock Identifier

Category

Anthropogenic (Man Made Material)

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

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

Conglomerate (Conglomerate rock) — sedimentary

Conglomerate

Conglomerate rock

Nephrite Jade (Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)) — metamorphic

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Sandstone (specifically Lithic or Quartz Arenite) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (specifically Lithic or Quartz Arenite)

Arenite (composed primarily of SiO2)

Sandstone (likely Graywacke or Arkose variant) (Clastic Sedimentary Rock (Lithic Sandstone)) — sedimentary

Sandstone (likely Graywacke or Arkose variant)

Clastic Sedimentary Rock (Lithic Sandstone)

Jasper (Jasper (Silicified microcrystalline quartz) - SiO2) — sedimentary

Jasper

Jasper (Silicified microcrystalline quartz) - SiO2

Sandstone (Ferruginous) (Arenite (composed primarily of SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Chert (often called Flint or River Stone) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint or River Stone)

Microcrystalline Quartz (SiO2)

Granite (Alkali-feldspar Granite) (Felsic Plutonic Rock (Primary minerals: Quartz SiO2, Orthoclase KAlSi3O8, Plagioclase (Na,Ca)AlSi3O8)) — igneous

Granite (Alkali-feldspar Granite)

Felsic Plutonic Rock (Primary minerals: Quartz SiO2, Orthoclase KAlSi3O8, Plagioclase (Na,Ca)AlSi3O8)

Sandstone (Quartzose Sandstone) (Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)

Banded Iron Formation (BIF) (Banded Iron Formation (Magnetite-Hematite-Chert)) — sedimentary

Banded Iron Formation (BIF)

Banded Iron Formation (Magnetite-Hematite-Chert)

Graphite (Graphite (Native Carbon, C)) — metamorphic

Graphite

Graphite (Native Carbon, C)

Quartz (Druzy or Crystalline variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Druzy or Crystalline variety)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Red Sandstone (Arenite (primarily Quartz with Iron Oxide)) — sedimentary

Red Sandstone

Arenite (primarily Quartz with Iron Oxide)

Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

Mookaite Jasper (Silicified Radiolarite (SiO2 with impurities)) — sedimentary

Mookaite Jasper

Silicified Radiolarite (SiO2 with impurities)

Chevron Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Chevron Amethyst

Silicon Dioxide (SiO2) with iron impurities

Sandstone (Ferruginous) (Arenite with Iron-Oxide Cement) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement

Chert (Flint) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Pink Granite (Phaneritic Quartz-Feldspar Granite) — igneous

Pink Granite

Phaneritic Quartz-Feldspar Granite

Greenschist (Greenschist (Chlorite Schist)) — metamorphic

Greenschist

Greenschist (Chlorite Schist)

Chlorastrolite (Greenstone) (Chlorastrolite (variety of Pumpellyite) - Ca2(Mg,Fe)Al2(SiO4)(Si2O7)(OH)2 · H2O) — mineral

Chlorastrolite (Greenstone)

Chlorastrolite (variety of Pumpellyite) - Ca2(Mg,Fe)Al2(SiO4)(Si2O7)(OH)2 · H2O

Diorite (Salt and Pepper Rock) (Phaneritic Plutonic Diorite (Plagioclase Feldspar + Amphibole/Biotite)) — igneous

Diorite (Salt and Pepper Rock)

Phaneritic Plutonic Diorite (Plagioclase Feldspar + Amphibole/Biotite)

Sandstone (likely Arkosic or Quartzose) (Arenite (SiO2 based with mineral inclusions)) — sedimentary

Sandstone (likely Arkosic or Quartzose)

Arenite (SiO2 based with mineral inclusions)

Thunderegg (Agetized Geode nodule) (Rhyolitic Agate Nodule (SiO2 filling volcanic cavities)) — igneous

Thunderegg (Agetized Geode nodule)

Rhyolitic Agate Nodule (SiO2 filling volcanic cavities)

Smoky Quartz (Silicon Dioxide (SiO₂)) — mineral

Smoky Quartz

Silicon Dioxide (SiO₂)

Quartzite Pebble (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Fossiliferous) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Fossiliferous)

Clastic Sedimentary Rock (primarily SiO2)

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

Sandstone (Quartzose Sandstone)

Arenite (primarily SiO2)

Red Granite (Phaneritic Plutonic Rock (High Potassium Feldspar)) — igneous

Red Granite

Phaneritic Plutonic Rock (High Potassium Feldspar)

Olivine (Peridotite) (Olivine Group; (Mg, Fe)2SiO4) — igneous

Olivine (Peridotite)

Olivine Group; (Mg, Fe)2SiO4

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Milky Quartz with Iron Inclusions (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Siltstone (Siltstone (composed of microscopic silt-sized particles of quartz and feldspar)) — sedimentary

Siltstone

Siltstone (composed of microscopic silt-sized particles of quartz and feldspar)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Sandstone (Ferruginous) (Arenite (composed primarily of SiO2 with Fe2O3 cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 cement)

Mica Schist (Mica Schist (primarily Muscovite and Biotite KAl2(AlSi3O10)(OH)2)) — metamorphic

Mica Schist

Mica Schist (primarily Muscovite and Biotite KAl2(AlSi3O10)(OH)2)

Chert (Jasper/River Stone) (Silicon dioxide (SiO2) - Microcrystalline quartz) — sedimentary

Chert (Jasper/River Stone)

Silicon dioxide (SiO2) - Microcrystalline quartz

Bivalve Fossil (Clam/Mollusk) (Class: Bivalvia (Order: Veneroida), Calcium Carbonate (CaCO3)) — sedimentary

Bivalve Fossil (Clam/Mollusk)

Class: Bivalvia (Order: Veneroida), Calcium Carbonate (CaCO3)

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

Chert (Flint variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)