Rock Identifier

Category

Anthropogenic (Man Made Material)

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

Learn about Anthropogenic (Man Made Material) in the encyclopedia

Opalite

Goldstone

Peat

Map Jasper

Blue Goldstone

Mandarin Garnet

Mandarin Garnet

Dunite

Andalusite

Zincite

Marl

Limonite

Diamond

Quartz-rich metamorphic rock, likely quartzite (Quartzite; predominantly microcrystalline quartz (SiO₂), possibly with mica or feldspar) — metamorphic

Quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly microcrystalline quartz (SiO₂), possibly with mica or feldspar

Red Sandstone (Arenite (with iron oxide cement)) — sedimentary

Red Sandstone

Arenite (with iron oxide cement)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Possible iron-rich basalt or industrial slag (Basalt, likely Fe–Mg silicate rock; exact identification is uncertain from the blurred image) — igneous

Possible iron-rich basalt or industrial slag

Basalt, likely Fe–Mg silicate rock; exact identification is uncertain from the blurred image

Granite (Granite) — igneous

Granite

Granite

Pumice (Pumice (a highly vesicular volcanic rock)) — igneous

Pumice

Pumice (a highly vesicular volcanic rock)

Basalt (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Quartzite River Rock (with Quartz Vein) (Quartzite (SiO2)) — metamorphic

Quartzite River Rock (with Quartz Vein)

Quartzite (SiO2)

Chert Breccia (Brecciated Chert (Microcrystalline Silica, SiO2)) — sedimentary

Chert Breccia

Brecciated Chert (Microcrystalline Silica, SiO2)

Chert (Arrowhead or Projectile Point) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Arrowhead or Projectile Point)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Polished amber-colored stone, possibly chert or jasper (Uncertain from image; likely microcrystalline quartz (SiO₂) if chert/jasper) — mineral

Polished amber-colored stone, possibly chert or jasper

Uncertain from image; likely microcrystalline quartz (SiO₂) if chert/jasper

Tumbled pale green aventurine (probable) (Quartz, SiO₂, with dispersed fuchsite or other green inclusions) — mineral

Tumbled pale green aventurine (probable)

Quartz, SiO₂, with dispersed fuchsite or other green inclusions

Quartz (SiO2) — mineral

Quartz

SiO2

Granite (Granite (a common rock name, not a single mineral species, composed primarily of quartz, feldspar, and mica/amphibole)) — igneous

Granite

Granite (a common rock name, not a single mineral species, composed primarily of quartz, feldspar, and mica/amphibole)

Tumbled blue sodalite (Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂) — mineral

Tumbled blue sodalite

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — sedimentary

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Sandstone (Sedimentary Rock (Quartz arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Quartz Arenite / Clastic Sedimentary Rock) — sedimentary

Sandstone

Quartz Arenite / Clastic Sedimentary Rock

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Pink Granite / K-Feldspar (Alkali feldspar granite / Potassium feldspar (Microcline/Orthoclase)) — igneous

Pink Granite / K-Feldspar

Alkali feldspar granite / Potassium feldspar (Microcline/Orthoclase)

Fossilized Coral (Rugosa or Tabulate Coral Fossil (Replacement by Silica/Calcite)) — fossil

Fossilized Coral

Rugosa or Tabulate Coral Fossil (Replacement by Silica/Calcite)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Sandstone (Quartz Arenite / Clastic Sedimentary Rock) — sedimentary

Sandstone

Quartz Arenite / Clastic Sedimentary Rock

Olivine ((Mg,Fe)2SiO4) — mineral

Olivine

(Mg,Fe)2SiO4

Sandstone (Clastic sedimentary rock composed mainly of quartz sand) — sedimentary

Sandstone

Clastic sedimentary rock composed mainly of quartz sand

Quartz-bearing Pegmatite with Metallic Sulfides (Pegmatite / Quartz-Feldspar Matrix with Pyrite and Mica) — igneous

Quartz-bearing Pegmatite with Metallic Sulfides

Pegmatite / Quartz-Feldspar Matrix with Pyrite and Mica

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Botryoidal Chalcedony / Quartz (Silicon Dioxide (SiO2)) — mineral

Botryoidal Chalcedony / Quartz

Silicon Dioxide (SiO2)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Boulder (Silicon Dioxide (SiO2)) — mineral

Quartz Boulder

Silicon Dioxide (SiO2)

Sandstone (Sedimentary Rock (Quartz arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite)

Red Sandstone (Quartzose Sandstone (primarily quartz grains cemented by iron oxides)) — sedimentary

Red Sandstone

Quartzose Sandstone (primarily quartz grains cemented by iron oxides)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Pebble (Lithic fragment / Water-worn rock) — sedimentary

Pebble

Lithic fragment / Water-worn rock

Sandstone with Iron Weathering (Quartz Arenite / Weathered Sandstone) — sedimentary

Sandstone with Iron Weathering

Quartz Arenite / Weathered Sandstone

Conglomerate (Clastic sedimentary rock (Conglomerate)) — sedimentary

Conglomerate

Clastic sedimentary rock (Conglomerate)

Sandstone Pebble (Sandstone (SiO2 rich clastic rock)) — sedimentary

Sandstone Pebble

Sandstone (SiO2 rich clastic rock)