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

Carved labradorite fish (Labradorite, calcium-rich plagioclase feldspar (approximately (Ca,Na)(Al,Si)₄O₈)) — mineral

Carved labradorite fish

Labradorite, calcium-rich plagioclase feldspar (approximately (Ca,Na)(Al,Si)₄O₈)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Granite (Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).) — igneous

Granite

Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).

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

Sandstone (Quartzose)

Arenite (composed primarily of SiO2)

Tumbled chert or jasper pebble (Microcrystalline quartz (SiO₂), likely chert/jasper) — sedimentary

Tumbled chert or jasper pebble

Microcrystalline quartz (SiO₂), likely chert/jasper

Rough Sapphire (Corundum) (Corundum (Al2O3)) — mineral

Rough Sapphire (Corundum)

Corundum (Al2O3)

Coquina (Coquina (Bioclastic Limestone)) — sedimentary

Coquina

Coquina (Bioclastic Limestone)

Polished black stone carving, likely soapstone/steatite (Steatite (massive talc), Mg₃Si₄O₁₀(OH)₂; exact material cannot be confirmed from the image) — metamorphic

Polished black stone carving, likely soapstone/steatite

Steatite (massive talc), Mg₃Si₄O₁₀(OH)₂; exact material cannot be confirmed from the image

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Flint (gray chert) (Microcrystalline quartz (SiO₂), a variety of chert) — sedimentary

Flint (gray chert)

Microcrystalline quartz (SiO₂), a variety of chert

Granite (Phaneritic plutonic felsic rock) — igneous

Granite

Phaneritic plutonic felsic rock

Black Obsidian (Obsidian (Volcanic Glass, SiO2 + impurities)) — igneous

Black Obsidian

Obsidian (Volcanic Glass, SiO2 + impurities)

Granite (Phaneritic Igneous Rock (composed mostly of Quartz, Alkali Feldspar, and Plagioclase)) — igneous

Granite

Phaneritic Igneous Rock (composed mostly of Quartz, Alkali Feldspar, and Plagioclase)

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

Chert (Honey Chert / Flint)

Silicon Dioxide (SiO2)

Chert (Microcrystalline silica (SiO2)) — sedimentary

Chert

Microcrystalline silica (SiO2)

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

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

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

Chert (Jasper/Flint)

Silicon Dioxide (SiO2)

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

Flint / Chert Pebble

Microcrystalline Quartz (SiO2)

Chert (Grey-Green Flint) (Microcrystalline silicon dioxide (SiO2)) — sedimentary

Chert (Grey-Green Flint)

Microcrystalline silicon dioxide (SiO2)

Chalcedony (likely blue agate) knapped into an arrowhead (Microcrystalline quartz, SiO₂ (chalcedony)) — mineral

Chalcedony (likely blue agate) knapped into an arrowhead

Microcrystalline quartz, SiO₂ (chalcedony)

Polished amethyst-bearing quartz (Quartz, SiO₂; purple coloration from irradiation and trace iron) — mineral

Polished amethyst-bearing quartz

Quartz, SiO₂; purple coloration from irradiation and trace iron

Yellow faceted gemstone, likely citrine or synthetic glass (Citrine (quartz, SiO₂) is the leading natural possibility; visual identification is uncertain from the photograph) — gemstone

Yellow faceted gemstone, likely citrine or synthetic glass

Citrine (quartz, SiO₂) is the leading natural possibility; visual identification is uncertain from the photograph

Likely flint (chert) fragment (Chert, microcrystalline quartz (SiO₂)) — sedimentary

Likely flint (chert) fragment

Chert, microcrystalline quartz (SiO₂)

Jasper / Chert (Red) (Cryptocrystalline quartz (SiO2)) — Sedimentary / Mineral

Jasper / Chert (Red)

Cryptocrystalline quartz (SiO2)

Sedimentary / Mineral

Sandstone (Ferruginous) (Arenite (SiO2 with Fe2O3 inclusions)) — sedimentary

Sandstone (Ferruginous)

Arenite (SiO2 with Fe2O3 inclusions)

Dyed turquoise-colored lava stone beads (Vesicular basalt (scoria), commonly sold as dyed lava rock) — igneous

Dyed turquoise-colored lava stone beads

Vesicular basalt (scoria), commonly sold as dyed lava rock

Colorless faceted gemstone, likely glass or cubic zirconia (Uncertain; possible cubic zirconia (ZrO₂) or quartz (SiO₂), but the image may show a man-made simulant) — gemstone

Colorless faceted gemstone, likely glass or cubic zirconia

Uncertain; possible cubic zirconia (ZrO₂) or quartz (SiO₂), but the image may show a man-made simulant

Chert (Cherty Shale / Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Cherty Shale / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Red coral (likely precious coral) (Corallium sp.; calcium-carbonate skeleton, primarily calcite) — gemstone

Red coral (likely precious coral)

Corallium sp.; calcium-carbonate skeleton, primarily calcite

Chert (specifically Flint or Nodular Chert) (Silicon dioxide (SiO2)) — sedimentary

Chert (specifically Flint or Nodular Chert)

Silicon dioxide (SiO2)

Chert (Jasper/Flint var.) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Flint var.)

Silicon Dioxide (SiO2)

Chert (often called Flint or River Stone) (Microcrystalline alpha-quartz (SiO2)) — sedimentary

Chert (often called Flint or River Stone)

Microcrystalline alpha-quartz (SiO2)

Chert (Chert / Flint Variety) (Microcrystalline / Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Chert / Flint Variety)

Microcrystalline / Cryptocrystalline Quartz (SiO2)

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

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Fossil Coral (Scleractinia (Stony Coral) fossil) — fossil

Fossil Coral

Scleractinia (Stony Coral) fossil

Tiger Shark Fossil Tooth (Galeocerdo cuvier (fossilized)) — sedimentary

Tiger Shark Fossil Tooth

Galeocerdo cuvier (fossilized)

Diamond (as set in a gold ring) (Carbon (C)) — mineral

Diamond (as set in a gold ring)

Carbon (C)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Slag (Industrial Byproduct) (Ferro-silicate glass (Slag)) — Anthropogenic (Man-made industrial deposit)

Slag (Industrial Byproduct)

Ferro-silicate glass (Slag)

Anthropogenic (Man-made industrial deposit)

Sea Glass (Uranium/Vaseline Glass variant) (Silicon Dioxide (SiO2) with trace Uranium Oxide (U3O8)) — man-made silicate (anthropogenic glass)

Sea Glass (Uranium/Vaseline Glass variant)

Silicon Dioxide (SiO2) with trace Uranium Oxide (U3O8)

man-made silicate (anthropogenic glass)

Sandstone (Arenite (mostly SiO2)) — sedimentary

Sandstone

Arenite (mostly SiO2)

Granodiorite (Intrusive Igneous Rock) — igneous

Granodiorite

Intrusive Igneous Rock