Rock Identifier

Category

Anthropogenic Material (Man Made Rock)

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

Learn about Anthropogenic Material (Man Made Rock) in the encyclopedia

Rock Gypsum

Talc-carbonate Rock

Talc-carbonate Rock

Opalite

Dunite

Goldstone

Anorthosite

Gondite

Limestone

Albitite

Coquina

Melteigite

Blue Goldstone

Granodiorite (Phaneritic Plutonic Intermediate-Felsic Rock) — igneous

Granodiorite

Phaneritic Plutonic Intermediate-Felsic Rock

Banded agate pendant (likely carnelian or brown-and-white chalcedony agate) (Agate, a banded variety of chalcedony; microcrystalline quartz, SiO₂, with iron-oxide coloration) — gemstone

Banded agate pendant (likely carnelian or brown-and-white chalcedony agate)

Agate, a banded variety of chalcedony; microcrystalline quartz, SiO₂, with iron-oxide coloration

Quartz Pebble (Beach Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (Beach Chalcedony)

Silicon Dioxide (SiO2)

Sandstone (Pebble) (Sandstone (SiO2 with matrix/cement)) — sedimentary

Sandstone (Pebble)

Sandstone (SiO2 with matrix/cement)

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Coquina (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Coquina

Biogenic Limestone (Calcium Carbonate, CaCO3)

Tumbled greenstone, likely nephrite jade (Nephrite jade (interlocking tremolite–actinolite amphibole; Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂)) — metamorphic

Tumbled greenstone, likely nephrite jade

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

Chert (Siltstone / Flint) (SiO2 (Cryptocrystalline Quartz)) — sedimentary

Chert (Siltstone / Flint)

SiO2 (Cryptocrystalline Quartz)

Blue-green chrysocolla rough specimen (Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite) — mineral

Blue-green chrysocolla rough specimen

Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite

Multicolor quartz bead bracelet (Quartz (silicon dioxide, SiO₂); bead colors may be from different varieties or treated quartz) — gemstone

Multicolor quartz bead bracelet

Quartz (silicon dioxide, SiO₂); bead colors may be from different varieties or treated quartz

Chert (Jasper/Flint variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Likely flint pebble (possibly a worked flint fragment) (Microcrystalline quartz (chalcedony), SiO₂; commonly called flint) — sedimentary

Likely flint pebble (possibly a worked flint fragment)

Microcrystalline quartz (chalcedony), SiO₂; commonly called flint

Chert (varieties: Flint or Jasper) (Silicon dioxide (SiO2) / Microcrystalline Quartz) — sedimentary

Chert (varieties: Flint or Jasper)

Silicon dioxide (SiO2) / Microcrystalline Quartz

Chert / Flint (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert / Flint

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Commonly known as Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Commonly known as Flint)

Silicon Dioxide (SiO2)

Chert (Jasper/Common Chert Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Common Chert Pebble)

Microcrystalline Quartz (SiO2)

Slag (Industrial Glass) (Artificial Vitreous Silicate) — mineraloid (anthropogenic)

Slag (Industrial Glass)

Artificial Vitreous Silicate

mineraloid (anthropogenic)

Brown chert (flint) (Microcrystalline quartz (SiO₂), varieties called chert or flint) — sedimentary

Brown chert (flint)

Microcrystalline quartz (SiO₂), varieties called chert or flint

Diamond (Diamond (pure Carbon, C)) — mineral

Diamond

Diamond (pure Carbon, C)

Red Sandstone (Arenite (Iron-rich)) — sedimentary

Red Sandstone

Arenite (Iron-rich)

Coquina (Bioclastic Limestone) — sedimentary

Coquina

Bioclastic Limestone

Polished/tumbled brown-and-white mineral fragment (Indeterminate; possibly quartz-rich jasper, brecciated jasper, or an iron-stained quartz mineral) — mineral

Polished/tumbled brown-and-white mineral fragment

Indeterminate; possibly quartz-rich jasper, brecciated jasper, or an iron-stained quartz mineral

Granodiorite / Granite (Weathered) (Granodiorite) — Igneous

Granodiorite / Granite (Weathered)

Granodiorite

Polished rutilated quartz cabochon (Quartz (SiO₂) with rutile inclusions (TiO₂)) — gemstone

Polished rutilated quartz cabochon

Quartz (SiO₂) with rutile inclusions (TiO₂)

Tumbled chalcedony pendant (likely agate) (Chalcedony, microcrystalline quartz (SiO₂); the pale bands suggest agate) — gemstone

Tumbled chalcedony pendant (likely agate)

Chalcedony, microcrystalline quartz (SiO₂); the pale bands suggest agate

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Flint or chert fragment (Microcrystalline quartz (SiO₂), likely flint/chert) — sedimentary

Flint or chert fragment

Microcrystalline quartz (SiO₂), likely flint/chert

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Chert (Jasper)

Silicon Dioxide (SiO2)

Chert (Yellow/Tan variety) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow/Tan variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

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

Chert Nodule (Flint)

Chert (Silicon Dioxide, SiO2)

Diamond (Diamond (Pure Carbon, C)) — mineral

Diamond

Diamond (Pure Carbon, C)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Arenite (SiO2 based typically)) — sedimentary

Sandstone

Arenite (SiO2 based typically)

Green cabochon gemstone, likely aventurine or dyed chalcedony (Indeterminate from image; possible quartz variety (SiO₂), including aventurine quartz or chalcedony) — gemstone

Green cabochon gemstone, likely aventurine or dyed chalcedony

Indeterminate from image; possible quartz variety (SiO₂), including aventurine quartz or chalcedony

Polished blue chalcedony (possibly agate) (Microcrystalline quartz, SiO₂; chalcedony, potentially banded agate) — mineral

Polished blue chalcedony (possibly agate)

Microcrystalline quartz, SiO₂; chalcedony, potentially banded agate

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

Chert (Flint)

Silicon Dioxide (SiO2)

Diabase (Dolerite) (Diabase) — igneous

Diabase (Dolerite)

Diabase

Granite (Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)) — igneous

Granite

Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)

Diamond (Diamond (pure Carbon, C)) — mineral

Diamond

Diamond (pure Carbon, C)