Rock Identifier

Category

Not A Natural Rock (Man Made Composite)

Browse not a natural rock (man made composite) specimens identified by the Rock Identifier community.

Learn about Not A Natural Rock (Man Made Composite) in the encyclopedia

Asphalt Rock

Rock Gypsum

Talc-carbonate Rock

Talc-carbonate Rock

Opalite

Chalk

Goldstone

Anorthosite

Albitite

Dunite

Gondite

Limestone

Coquina

Granitoid (Granite/Granodiorite) (Plutonic igneous rock (variable composition, primarily SiO2)) — igneous

Granitoid (Granite/Granodiorite)

Plutonic igneous rock (variable composition, primarily SiO2)

Blue Dyed Agate Geode Slice (Chalcedony (Silicon Dioxide, SiO2) with artificial cobalt/iron-based dye) — mineral

Blue Dyed Agate Geode Slice

Chalcedony (Silicon Dioxide, SiO2) with artificial cobalt/iron-based dye

Tumbled blue stone with a drilled hole (Likely dyed or naturally blue chalcedony/agate; identity cannot be confirmed from the photo) — mineral

Tumbled blue stone with a drilled hole

Likely dyed or naturally blue chalcedony/agate; identity cannot be confirmed from the photo

Chert Pebble/Nodule (Chert (a microcrystalline or cryptocrystalline sedimentary form of quartz, SiO2)) — Sedimentary

Chert Pebble/Nodule

Chert (a microcrystalline or cryptocrystalline sedimentary form of quartz, SiO2)

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

Sandstone (Pebble)

Arenite (primarily SiO2)

Yellow Quartz (Citrine/Yellow Jasper mix) (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Yellow Quartz (Citrine/Yellow Jasper mix)

Silicon Dioxide (SiO2) with iron oxide inclusions

Basalt Xenolith in Matrix (Basaltic Mafic Xenolith / Ultra-mafic Inclusion) — igneous

Basalt Xenolith in Matrix

Basaltic Mafic Xenolith / Ultra-mafic Inclusion

Rounded granitic pebble (Granite, likely biotite granite or granodiorite) — igneous

Rounded granitic pebble

Granite, likely biotite granite or granodiorite

Tumbled quartz-rich stone, possibly blue quartz or granite (Quartz (SiO₂), with probable feldspar and dark accessory minerals) — mineral

Tumbled quartz-rich stone, possibly blue quartz or granite

Quartz (SiO₂), with probable feldspar and dark accessory minerals

Granite Cobble (Phaneritic Felsic Igneous Rock) — igneous

Granite Cobble

Phaneritic Felsic Igneous Rock

Granite (Granite (Phaneritic igneous rock)) — igneous

Granite

Granite (Phaneritic igneous rock)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Smoky Quartz (Tumbled) (Smoky Quartz (SiO2 - Silicon Dioxide)) — mineral

Smoky Quartz (Tumbled)

Smoky Quartz (SiO2 - Silicon Dioxide)

Pink Granite (Water-worn Cobble) (Phaneritic Felsic Intrusive Igneous Rock) — igneous

Pink Granite (Water-worn Cobble)

Phaneritic Felsic Intrusive Igneous Rock

Granite (Phaneritic intrusive igneous rock (Granite)) — igneous

Granite

Phaneritic intrusive igneous rock (Granite)

Shale (Shale (Lutite)) — sedimentary

Shale

Shale (Lutite)

Vein-filled Sedimentary Rock (Silicified sedimentary rock with quartz/calcite vein) — sedimentary

Vein-filled Sedimentary Rock

Silicified sedimentary rock with quartz/calcite vein

Pumice (Vesicular Rhyolite or Trachyte (High-silica volcanic glass)) — igneous

Pumice

Vesicular Rhyolite or Trachyte (High-silica volcanic glass)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

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

Chalcedony (Agate / Quartz Beach Pebble)

Silicon Dioxide (SiO2)

Scoria (Vesicular Mafic Igneous Rock) — igneous

Scoria

Vesicular Mafic Igneous Rock

Sandstone (Arenite (Siliclastic sedimentary rock, primarily SiO2)) — sedimentary

Sandstone

Arenite (Siliclastic sedimentary rock, primarily SiO2)

Petoskey Stone / Rugose Coral Fossil (Hexagonaria percarinata) — fossil

Petoskey Stone / Rugose Coral Fossil

Hexagonaria percarinata

Quartzite (Quartzite (composed primarily of SiO2)) — metamorphic

Quartzite

Quartzite (composed primarily of SiO2)

Granite (Weathered) (Plutonic Igneous Rock (Granitic)) — igneous

Granite (Weathered)

Plutonic Igneous Rock (Granitic)

Sandstone (Arenite (clastic sedimentary rock)) — sedimentary

Sandstone

Arenite (clastic sedimentary rock)

Rough Amethyst (Silicon Dioxide (SiO2) with Iron impurities) — mineral

Rough Amethyst

Silicon Dioxide (SiO2) with Iron impurities

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Clear Quartz / Diamond (untested) (Silicon Dioxide (SiO2) or Carbon (C)) — mineral

Clear Quartz / Diamond (untested)

Silicon Dioxide (SiO2) or Carbon (C)

Petoskey Stone (Hexagonaria percarinata) — fossil

Petoskey Stone

Hexagonaria percarinata

Carnelian Agate Beads (Silicon Dioxide (SiO2)) — gemstone

Carnelian Agate Beads

Silicon Dioxide (SiO2)

Sandstone (Sedimentary Clastic Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Clastic Rock (Quartz Arenite)

Basalt Pebble (Extrusive Igneous Rock) — igneous

Basalt Pebble

Extrusive Igneous Rock

Yellow Quartz / Chalcedony (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz / Chalcedony

Silicon Dioxide (SiO2)

Polished citrine quartz point (Quartz, silicon dioxide (SiO₂), yellow-orange variety commonly sold as citrine; possibly heat-treated amethyst) — mineral

Polished citrine quartz point

Quartz, silicon dioxide (SiO₂), yellow-orange variety commonly sold as citrine; possibly heat-treated amethyst

Conglomerate (Conglomerate (Clastic Sedimentary Rock)) — sedimentary

Conglomerate

Conglomerate (Clastic Sedimentary Rock)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

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

Turquoise

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

Agate (specifically Botswana or Banded Agate variety) (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Agate (specifically Botswana or Banded Agate variety)

Chalcedony (Silicon Dioxide, SiO2)

Herkimer Diamond (Quartz (Silicon Dioxide - SiO2)) — mineral

Herkimer Diamond

Quartz (Silicon Dioxide - SiO2)

Pumice (Pumicite (Volcanic glass with vesicular texture)) — igneous

Pumice

Pumicite (Volcanic glass with vesicular texture)

Mixed tumbled stone collection (Assorted minerals, likely including quartz, jasper, agate, and possibly obsidian or hematite) — mineral

Mixed tumbled stone collection

Assorted minerals, likely including quartz, jasper, agate, and possibly obsidian or hematite