Rock Identifier

Category

Anthropogenic (Man Made Material Processed By Nature)

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

Learn about Anthropogenic (Man Made Material Processed By Nature) in the encyclopedia

Opalite

Goldstone

Blue Goldstone

Dunite

Zincite

Emerald Crystal

Emerald Crystal

Orange Obsidian

Diamond

Lavender Obsidian

Electric Blue Obsidian

Tripolite

Violet Obsidian

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Siltstone Pebble (Siltstone (primarily SiO2 with Al2O3)) — sedimentary

Siltstone Pebble

Siltstone (primarily SiO2 with Al2O3)

Quartz Vein on Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Vein on Matrix

Silicon Dioxide (SiO2)

Milky Quartz with Chlorite inclusion (Silicon Dioxide (SiO2) with Chlorite group inclusions) — mineral

Milky Quartz with Chlorite inclusion

Silicon Dioxide (SiO2) with Chlorite group inclusions

Sandstone (Clastic sedimentary rock) — sedimentary

Sandstone

Clastic sedimentary rock

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

Sandstone

Sedimentary rock composed mainly of quartz sand

Sandstone (Arenite (mainly SiO2 with varying cements)) — sedimentary

Sandstone

Arenite (mainly SiO2 with varying cements)

Sandstone (Quartzite-rich) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Quartzite-rich)

Clastic sedimentary rock (primarily SiO2)

River Rock (Sandstone or Quartzite) (Clastic Sedimentary Rock / Quartzite) — sedimentary

River Rock (Sandstone or Quartzite)

Clastic Sedimentary Rock / Quartzite

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Likely polished dark pebble (Indeterminate; possibly basalt, black jasper, or a dark sulfide-rich stone) — mineral

Likely polished dark pebble

Indeterminate; possibly basalt, black jasper, or a dark sulfide-rich stone

Citrine (Silicon Dioxide (SiO2)) — mineral

Citrine

Silicon Dioxide (SiO2)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

Lepidolite on Pegmatite (Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) in Granitic Pegmatite) — igneous

Lepidolite on Pegmatite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) in Granitic Pegmatite

Sandstone (Sedimentary Rock (Quartz arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite)

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

Sandstone (Ferruginous)

Sandstone (primarily SiO2 with iron oxide cement Fe2O3)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Rough Diamond (Native Carbon (C)) — mineral

Rough Diamond

Native Carbon (C)

Diamond (Diamond (pure carbon, C)) — gemstone

Diamond

Diamond (pure carbon, C)

Amethyst quartz cluster (Quartz, SiO₂; purple coloration from iron impurities and irradiation) — mineral

Amethyst quartz cluster

Quartz, SiO₂; purple coloration from iron impurities and irradiation

Staurolite-bearing mica schist (probable) (Mica schist composed chiefly of muscovite/biotite, quartz, and likely staurolite or garnet) — metamorphic

Staurolite-bearing mica schist (probable)

Mica schist composed chiefly of muscovite/biotite, quartz, and likely staurolite or garnet

Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

Chert (Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

Chert / Flint (Silicon Dioxide (SiO2)) — sedimentary

Chert / Flint

Silicon Dioxide (SiO2)

Chert (Black Chert/Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Black Chert/Flint)

Silicon Dioxide (SiO2)

Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

Sandstone (Sedimentary Rock (Quartz arenite/Arkose)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite/Arkose)

Tektite (Natural impact glass) — meteorite

Tektite

Natural impact glass

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

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Aura Quartz Geode (Angel Aura Quartz) (Silicon Dioxide (SiO2) bonded with precious metals) — mineral

Aura Quartz Geode (Angel Aura Quartz)

Silicon Dioxide (SiO2) bonded with precious metals

Sandstone (likely Ferruginous) (Arenite (SiO2 with iron oxide impurities)) — sedimentary

Sandstone (likely Ferruginous)

Arenite (SiO2 with iron oxide impurities)

Olivine/Peridot (Magnesium Iron Silicate (Mg,Fe)2SiO4) — mineral

Olivine/Peridot

Magnesium Iron Silicate (Mg,Fe)2SiO4

Olivine (Peridotite) ((Mg,Fe)2SiO4 (Magnesium Iron Silicate)) — igneous

Olivine (Peridotite)

(Mg,Fe)2SiO4 (Magnesium Iron Silicate)

Metallic sulfide mineral fragment, likely bornite or chalcopyrite (Bornite (Cu₅FeS₄) or chalcopyrite (CuFeS₂)) — mineral

Metallic sulfide mineral fragment, likely bornite or chalcopyrite

Bornite (Cu₅FeS₄) or chalcopyrite (CuFeS₂)

Turquoise (Hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O) — mineral

Turquoise

Hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Likely quartz-rich metamorphic rock (quartzite or milky quartz) (Quartzite; predominantly quartz (SiO₂), possibly with feldspar and iron-oxide staining) — metamorphic

Likely quartz-rich metamorphic rock (quartzite or milky quartz)

Quartzite; predominantly quartz (SiO₂), possibly with feldspar and iron-oxide staining

Likely weathered quartz-rich stone or fossil fragment (Indeterminate; possibly quartz-bearing sandstone, iron-stained quartz, or a fragmentary fossil) — mineral

Likely weathered quartz-rich stone or fossil fragment

Indeterminate; possibly quartz-bearing sandstone, iron-stained quartz, or a fragmentary fossil

Botryoidal hematite (speculative) (Hematite, iron(III) oxide (Fe₂O₃), possibly mixed with goethite or magnetite) — mineral

Botryoidal hematite (speculative)

Hematite, iron(III) oxide (Fe₂O₃), possibly mixed with goethite or magnetite

Polished nephrite jade (Nephrite jade; compact amphibole aggregate, chiefly tremolite–actinolite, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂) — metamorphic

Polished nephrite jade

Nephrite jade; compact amphibole aggregate, chiefly tremolite–actinolite, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂