Rock Identifier

Category

Mineral Description (Anthropogenic Material)

Browse mineral description (anthropogenic material) specimens identified by the Rock Identifier community.

Learn about Mineral Description (Anthropogenic Material) in the encyclopedia

Peat

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Brookite

Talc

Euxenite

Eltyubyuite

Buergerite

Polished copper-bearing mineral specimen, likely malachite-rich copper ore (Malachite, Cu₂CO₃(OH)₂, possibly mixed with chrysocolla or limonite) — mineral

Polished copper-bearing mineral specimen, likely malachite-rich copper ore

Malachite, Cu₂CO₃(OH)₂, possibly mixed with chrysocolla or limonite

Rose Quartz (Silicon dioxide (SiO2)) — mineral

Rose Quartz

Silicon dioxide (SiO2)

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

Sandstone

Arenite (composed primarily of SiO2)

Red Sandstone (Arenite (composed primarily of Quartz and Iron Oxide)) — sedimentary

Red Sandstone

Arenite (composed primarily of Quartz and Iron Oxide)

Mixed Mineral Collection (Multi-mineral Assemblage (Quartz, Jasper, Obsidian, Pyrite, etc.)) — mineral

Mixed Mineral Collection

Multi-mineral Assemblage (Quartz, Jasper, Obsidian, Pyrite, etc.)

Sandstone (Quartzite Pebble) (Arenite (SiO2)) — sedimentary

Sandstone (Quartzite Pebble)

Arenite (SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Sandstone (likely Arkosic or Quartzose) (Sandstone (SiO2 dominated)) — sedimentary

Sandstone (likely Arkosic or Quartzose)

Sandstone (SiO2 dominated)

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

Sandstone (Quartzose)

Arenite (SiO2 based)

Red Sandstone (Iron-rich) (Arenite (with Hematite cement)) — sedimentary

Red Sandstone (Iron-rich)

Arenite (with Hematite cement)

Rounded white pebble, likely quartz or feldspar (Most consistent with milky quartz (SiO₂), though altered feldspar or calcite is possible from the image) — mineral

Rounded white pebble, likely quartz or feldspar

Most consistent with milky quartz (SiO₂), though altered feldspar or calcite is possible from the image

Dyed Chalcedony (Agate) (Silicon Dioxide (SiO2) with artificial pigment) — mineral

Dyed Chalcedony (Agate)

Silicon Dioxide (SiO2) with artificial pigment

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Petrified Wood (Silicified wood (primarily Quartz/Chalcedony, SiO2)) — mineral

Petrified Wood

Silicified wood (primarily Quartz/Chalcedony, SiO2)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Diamond (C (Native Carbon)) — mineral

Diamond

C (Native Carbon)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Sandstone (Ferruginous) (Arenite (primarily SiO2 with iron oxide Fe2O3 cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide Fe2O3 cement)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Fossil Shark Tooth (Chondrichthyes (class); likely Lamniformes (order) fossilized in Apatite/Hydroxyapatite) — fossil

Fossil Shark Tooth

Chondrichthyes (class); likely Lamniformes (order) fossilized in Apatite/Hydroxyapatite

Fossilized Gastropod Shell (Class Gastropoda (Fossil)) — sedimentary

Fossilized Gastropod Shell

Class Gastropoda (Fossil)

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

Jasper

Silicon dioxide (SiO2) with impurities

Tumbled jasper or chert (Microcrystalline quartz (SiO₂), possibly iron-bearing jasper) — mineral

Tumbled jasper or chert

Microcrystalline quartz (SiO₂), possibly iron-bearing jasper

Tumbled black-and-white banded stone, likely onyx or agate (Cryptocrystalline quartz (SiO₂), probably banded chalcedony/onyx) — mineral

Tumbled black-and-white banded stone, likely onyx or agate

Cryptocrystalline quartz (SiO₂), probably banded chalcedony/onyx

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

Quartz (Common or Milky Quartz) with Iron Staining (Silicon Dioxide (SiO2)) — mineral

Quartz (Common or Milky Quartz) with Iron Staining

Silicon Dioxide (SiO2)

Yellow Jasper (SiO2 (Microcrystalline Quartz)) — mineral

Yellow Jasper

SiO2 (Microcrystalline Quartz)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Agate (Carnelian / Fire Agate nodule) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Agate (Carnelian / Fire Agate nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Carnelian / Chalcedony (Silicon Dioxide (SiO2)) — mineral

Carnelian / Chalcedony

Silicon Dioxide (SiO2)

Citrine Quartz / Yellow Quartz Pebbles (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz / Yellow Quartz Pebbles

Silicon Dioxide (SiO2)

Sodalite (Sodalite (Na8Al6Si6O24Cl2)) — mineral

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Quartz River Pebble (Crystalline Silicon Dioxide (SiO2)) — mineral

Quartz River Pebble

Crystalline Silicon Dioxide (SiO2)

Carnelian (Chalcedony) (Silicon Dioxide (SiO2) - variety of Chalcedony) — mineral

Carnelian (Chalcedony)

Silicon Dioxide (SiO2) - variety of Chalcedony

Turquoise (Turquoise (CuAl6(PO4)4(OH)8·4H2O)) — mineral

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Quartz Geode (Crystalline Silica (SiO2)) — mineral

Quartz Geode

Crystalline Silica (SiO2)

Sunstone (Plagioclase Feldspar (Na,Ca)(Al,Si)4O8) — mineral

Sunstone

Plagioclase Feldspar (Na,Ca)(Al,Si)4O8

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Green Common Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Green Common Opal

Hydrated Silica (SiO2·nH2O)