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

Quartz (Water-worn Pebbles) (Silicon Dioxide (SiO2)) — mineral

Quartz (Water-worn Pebbles)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

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

Fluorite on Host Rock

Calcium Fluoride (CaF2)

Red Sandstone (Arenite (primarily SiO2 with Fe2O3)) — sedimentary

Red Sandstone

Arenite (primarily SiO2 with Fe2O3)

Limonite (Iron-rich Siltstone / Sandstone base) (Hydrous ferric oxide mixture (FeO(OH)·nH2O)) — sedimentary

Limonite (Iron-rich Siltstone / Sandstone base)

Hydrous ferric oxide mixture (FeO(OH)·nH2O)

Slag Glass (Cullet Glass) (Amorphous Silica (Industrial byproduct)) — mineral

Slag Glass (Cullet Glass)

Amorphous Silica (Industrial byproduct)

Polished brecciated jasper (likely septarian or iron-rich jasper) (Microcrystalline quartz (chalcedony), SiO₂, with iron oxides and possibly calcite or other rock fragments) — sedimentary

Polished brecciated jasper (likely septarian or iron-rich jasper)

Microcrystalline quartz (chalcedony), SiO₂, with iron oxides and possibly calcite or other rock fragments

Quartz vein in Host Rock (Crystalline Silicon Dioxide (SiO2) in Lithic Matrix) — metamorphic

Quartz vein in Host Rock

Crystalline Silicon Dioxide (SiO2) in Lithic Matrix

Polished Red Quartz (or Carnelian / Red Jasper) (Silicon Dioxide (SiO2)) — mineral

Polished Red Quartz (or Carnelian / Red Jasper)

Silicon Dioxide (SiO2)

Limonite (Iron Ore/Bog Iron) (Hydrated iron(III) oxide-hydroxide (FeO(OH)nH2O)) — mineral

Limonite (Iron Ore/Bog Iron)

Hydrated iron(III) oxide-hydroxide (FeO(OH)nH2O)

Blue-gray metamorphic rock, likely gneiss or schist (Quartz–feldspar–mica assemblage; exact identification requires testing) — metamorphic

Blue-gray metamorphic rock, likely gneiss or schist

Quartz–feldspar–mica assemblage; exact identification requires testing

Sandstone (Sedimentary Rock (Quartz Sandstone)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Sandstone)

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Sandstone (with Arkose characteristics) (Clastic sedimentary rock (SiO2 with KAlSi3O8)) — sedimentary

Sandstone (with Arkose characteristics)

Clastic sedimentary rock (SiO2 with KAlSi3O8)

Sandstone Pebble (Sedimentary Rock (Quartzose Sandstone)) — sedimentary

Sandstone Pebble

Sedimentary Rock (Quartzose Sandstone)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Diamond (in jewelry setting) (Carbon (C)) — mineral

Diamond (in jewelry setting)

Carbon (C)

Sandstone (Arenite (predominantly SiO2)) — sedimentary

Sandstone

Arenite (predominantly SiO2)

Sandstone (Arenite (specifically Quartz Arenite)) — sedimentary

Sandstone

Arenite (specifically Quartz Arenite)

Sandstone (with minor quartz and possible clay components) (Clastic Sedimentary Rock (SiO2 dominated)) — sedimentary

Sandstone (with minor quartz and possible clay components)

Clastic Sedimentary Rock (SiO2 dominated)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

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

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

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

Quartz (Small Fragment)

Silicon Dioxide (SiO2)

Tumbled hematite-rich jasper (Jasper (microcrystalline quartz, SiO₂) with iron oxides, chiefly hematite (Fe₂O₃)) — mineral

Tumbled hematite-rich jasper

Jasper (microcrystalline quartz, SiO₂) with iron oxides, chiefly hematite (Fe₂O₃)

Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky or Clear variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Clear variety)

Silicon Dioxide (SiO2)

Dzi Bead (Agate Bead) (Cryptocrystalline Quartz (SiO2) - Chalcedony/Agate) — mineral

Dzi Bead (Agate Bead)

Cryptocrystalline Quartz (SiO2) - Chalcedony/Agate

Red jasper (likely tumbled) (Jasper, microcrystalline quartz/chalcedony (SiO₂), colored mainly by iron oxides) — mineral

Red jasper (likely tumbled)

Jasper, microcrystalline quartz/chalcedony (SiO₂), colored mainly by iron oxides

Polished labradorite cabochon (Labradorite, CaAl₂Si₂O₈–NaAlSi₃O₈ (feldspar solid solution)) — mineral

Polished labradorite cabochon

Labradorite, CaAl₂Si₂O₈–NaAlSi₃O₈ (feldspar solid solution)

Chalcedony (Agatized Coral / Rough Chalcedony Node) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agatized Coral / Rough Chalcedony Node)

Silicon Dioxide (SiO2)

Moissanite (Silicon Carbide (SiC)) — mineral

Moissanite

Silicon Carbide (SiC)

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

Quartz (Small Pebble)

Silicon Dioxide (SiO2)

Picture Jasper (SiO2) — mineral

Picture Jasper

SiO2

Fossilized Bone (Permineralized Vertebrate Bone) — fossil

Fossilized Bone

Permineralized Vertebrate Bone

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Glauconitic Sandstone (Glauconitic Sandstone (Greensand)) — sedimentary

Glauconitic Sandstone

Glauconitic Sandstone (Greensand)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Sandstone (Red Sandstone) (Arenite (SiO2 based with Fe2O3 staining)) — sedimentary

Sandstone (Red Sandstone)

Arenite (SiO2 based with Fe2O3 staining)