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

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Amazonite (Microcline (K(AlSi3O8))) — mineral

Amazonite

Microcline (K(AlSi3O8))

Labradorite (Labradorite ((Ca, Na)(Al, Si)4O8)) — mineral

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Chlorastrolite (Isle Royale Greenstone) (Chlorastrolite (Pumpellyite-(Mg,Fe2+): Ca2MgAl2(Si2O7)(SiO4)(OH)2∙H2O)) — mineral

Chlorastrolite (Isle Royale Greenstone)

Chlorastrolite (Pumpellyite-(Mg,Fe2+): Ca2MgAl2(Si2O7)(SiO4)(OH)2∙H2O)

Quartz with Iron Staining (Silicon Dioxide (SiO2) with Hematite inclusions) — mineral

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Hematite inclusions

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

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Milky Quartz (Water-worn pebble) (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz (Water-worn pebble)

Quartz (Silicon Dioxide, SiO2)

Tiger Iron (Tiger Iron (composite of Tiger's Eye, Red Jasper, and Hematite)) — metamorphic

Tiger Iron

Tiger Iron (composite of Tiger's Eye, Red Jasper, and Hematite)

Serpentine pendant (Serpentinite; chiefly antigorite, lizardite, or chrysotile Mg₃Si₂O₅(OH)₄) — metamorphic

Serpentine pendant

Serpentinite; chiefly antigorite, lizardite, or chrysotile Mg₃Si₂O₅(OH)₄

Vesicular volcanic scoria (likely weathered basaltic scoria) (Scoria; chiefly vesicular basalt, composed mainly of plagioclase, pyroxene, and iron-rich glass) — igneous

Vesicular volcanic scoria (likely weathered basaltic scoria)

Scoria; chiefly vesicular basalt, composed mainly of plagioclase, pyroxene, and iron-rich glass

Sandstone (Arenite (primarily Quartz chemical formula SiO2)) — sedimentary

Sandstone

Arenite (primarily Quartz chemical formula SiO2)

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

Sandstone (Quartzose)

Arenite (composed mainly of SiO2)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

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

Sandstone (Quartzose Sandstone)

Arenite (primarily SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Red Sandstone (Ferruginous Sandstone (SiO2 dominated with Fe2O3 cement)) — sedimentary

Red Sandstone

Ferruginous Sandstone (SiO2 dominated with Fe2O3 cement)

Small rounded stone, likely basalt or weathered mafic rock (Fine-grained basalt; exact identification requires testing) — igneous

Small rounded stone, likely basalt or weathered mafic rock

Fine-grained basalt; exact identification requires testing

Siltstone with iron staining (Siltstone (primarily SiO2 with FeO(OH) coatings)) — sedimentary

Siltstone with iron staining

Siltstone (primarily SiO2 with FeO(OH) coatings)

Granite or granitic rock fragment (Felsic intrusive igneous rock, typically quartz + feldspar + mica; exact species uncertain from the image) — igneous

Granite or granitic rock fragment

Felsic intrusive igneous rock, typically quartz + feldspar + mica; exact species uncertain from the image

Diorite (Spotted) (Diorite (Intrusive igneous rock)) — igneous

Diorite (Spotted)

Diorite (Intrusive igneous rock)

Banded sandstone pebble (Quartz-rich lithic sandstone; exact provenance and composition require testing) — sedimentary

Banded sandstone pebble

Quartz-rich lithic sandstone; exact provenance and composition require testing

Likely weathered quartz-rich stone (Indeterminate; possibly quartz-bearing granite or milky quartz) — mineral

Likely weathered quartz-rich stone

Indeterminate; possibly quartz-bearing granite or milky quartz

Mammoth Tooth (Mammuthus primigenius (Tooth fragment)) — fossil

Mammoth Tooth

Mammuthus primigenius (Tooth fragment)

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Limestone (Weathered) (Sedimentary Carbonate Rock (CaCO3)) — sedimentary

Limestone (Weathered)

Sedimentary Carbonate Rock (CaCO3)

Blue Apatite (Apatite (Group), Ca5(PO4)3(F,Cl,OH)) — mineral

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Unidentified dark pebble (Undetermined; possibly polished basalt, chert, or iron-rich stone) — mineral

Unidentified dark pebble

Undetermined; possibly polished basalt, chert, or iron-rich stone

Petrified Wood (Silicified Wood (primarily SiO₂ / Silicon Dioxide)) — mineral

Petrified Wood

Silicified Wood (primarily SiO₂ / Silicon Dioxide)

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

Petrified Wood

Silicified Wood (primarily Quartz or Chalcedony, SiO2)

Banded Chert (likely Flint or Jasper variety) (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert (likely Flint or Jasper variety)

Silicon Dioxide (SiO2)

Black Obsidian (Faceted) (Volcanic Glass (Amorphous Silicon Dioxide)) — igneous

Black Obsidian (Faceted)

Volcanic Glass (Amorphous Silicon Dioxide)

Chert / Flint (Chert (varietal name for microcrystalline quartz). Chemical formula: SiO₂) — Mineral

Chert / Flint

Chert (varietal name for microcrystalline quartz). Chemical formula: SiO₂

Polished dendritic agate or jasper (Microcrystalline quartz (SiO₂), likely chalcedony with manganese-oxide dendrites) — mineral

Polished dendritic agate or jasper

Microcrystalline quartz (SiO₂), likely chalcedony with manganese-oxide dendrites

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

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Quartz-rich breccia or quartzite with iron-oxide veining (Microcrystalline to granular SiO₂ (quartz), with hematite/goethite and minor feldspar or mica) — metamorphic

Quartz-rich breccia or quartzite with iron-oxide veining

Microcrystalline to granular SiO₂ (quartz), with hematite/goethite and minor feldspar or mica

Banded Calcite (often commercially sold as 'Mexican Onyx' or 'Honey Onyx') (Calcite (Calcium Carbonate, CaCO3)) — sedimentary

Banded Calcite (often commercially sold as 'Mexican Onyx' or 'Honey Onyx')

Calcite (Calcium Carbonate, CaCO3)

Tektite (Natural impact glass) — meteorite

Tektite

Natural impact glass