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

Dalmatian Jasper (Dyed Blue) (Peralkaline Rock with Arfvedsonite and Blue Dye) — igneous

Dalmatian Jasper (Dyed Blue)

Peralkaline Rock with Arfvedsonite and Blue Dye

Chert (specifically Flint or Common Chert node) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Flint or Common Chert node)

Silicon Dioxide (SiO2)

Purple Dyed Dalmatian Stone (Dyed Peralkaline Trachyte) — igneous

Purple Dyed Dalmatian Stone

Dyed Peralkaline Trachyte

Tumbled brecciated jasper (Silica-rich microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and other mineral inclusions) — mineral

Tumbled brecciated jasper

Silica-rich microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and other mineral inclusions

Hag Stone (Perforated Quartz Pebble / Sedimentary Rock) — sedimentary

Hag Stone

Perforated Quartz Pebble / Sedimentary Rock

Sandstone Pebble (Arenite (SiO2 dominated with iron oxide)) — sedimentary

Sandstone Pebble

Arenite (SiO2 dominated with iron oxide)

Sandstone (Sedimentary Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Arenite)

Coquina (Coquina (Bioclastic Limestone)) — sedimentary

Coquina

Coquina (Bioclastic Limestone)

Granite Pebble (Phaneritic plutonic rock (SiO2 primary)) — igneous

Granite Pebble

Phaneritic plutonic rock (SiO2 primary)

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

Granite

Granite (Phaneritic intrusive igneous rock)

Granite (Felsic intrusive igneous rock (Granite)) — igneous

Granite

Felsic intrusive igneous rock (Granite)

Conglomerate (Conglomerate rock (detrital sedimentary)) — sedimentary

Conglomerate

Conglomerate rock (detrital sedimentary)

Clear Quartz Point (Silicon Dioxide (SiO2)) — mineral

Clear Quartz Point

Silicon Dioxide (SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Riverstone Quartzite (Water-worn Siltstone/Quartzite) (Metamorphosed Quartz-rich Arenite (SiO2)) — metamorphic

Riverstone Quartzite (Water-worn Siltstone/Quartzite)

Metamorphosed Quartz-rich Arenite (SiO2)

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

Sandstone (Micaceous)

Arenite (composed primarily of SiO2)

Brachiopod Fossil (Spiriferid) (Order Spiriferida (Phylum Brachiopoda); mineralized as Calcite (CaCO3) or Chert (SiO2)) — sedimentary (fossilized organic remain)

Brachiopod Fossil (Spiriferid)

Order Spiriferida (Phylum Brachiopoda); mineralized as Calcite (CaCO3) or Chert (SiO2)

sedimentary (fossilized organic remain)

Obsidian (Volcanic Glass) — igneous

Obsidian

Volcanic Glass

Shale (Shale (Fine-grained clastic sedimentary rock)) — sedimentary

Shale

Shale (Fine-grained clastic sedimentary rock)

Sandstone (Ferruginous) (Sandstone (SiO2 with iron oxide inclusions)) — sedimentary

Sandstone (Ferruginous)

Sandstone (SiO2 with iron oxide inclusions)

Red Sandstone (Quartzose Sandstone (SiO2)) — sedimentary

Red Sandstone

Quartzose Sandstone (SiO2)

Mixed rock and mineral gravel (Predominantly granite/granodiorite, basaltic rocks, quartz, and possible gneiss; exact identification is uncertain from the image) — igneous

Mixed rock and mineral gravel

Predominantly granite/granodiorite, basaltic rocks, quartz, and possible gneiss; exact identification is uncertain from the image

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Granite (Granite) — igneous

Granite

Granite

Polished black agate slice (Chalcedony (microcrystalline quartz), SiO₂, with iron/manganese staining) — mineral

Polished black agate slice

Chalcedony (microcrystalline quartz), SiO₂, with iron/manganese staining

Hag Stone (Sandstone with Boreholes) (Bored Sandstone (Sedimentary rock with lithophaga-style borings)) — sedimentary

Hag Stone (Sandstone with Boreholes)

Bored Sandstone (Sedimentary rock with lithophaga-style borings)

Red Sandstone (Arenite (primarily Quartz with Hematite cement)) — sedimentary

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Opal (Hydrated silica (SiO2 "NH2O)) — mineraloid

Opal

Hydrated silica (SiO2 "NH2O)

Sandstone Pebble (Arenite (primarily SiO2)) — sedimentary

Sandstone Pebble

Arenite (primarily SiO2)

Shale with Coprolite influence (Argillaceous sedimentary rock (Shale/Mudstone)) — sedimentary

Shale with Coprolite influence

Argillaceous sedimentary rock (Shale/Mudstone)

Orange Quartzite (or Quartz River Pebble) (Silicon Dioxide (SiO2) - Quartzite) — metamorphic

Orange Quartzite (or Quartz River Pebble)

Silicon Dioxide (SiO2) - Quartzite

Clear Quartz Crystal (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Granite (Granite (phaneritic felsic intrusive rock)) — igneous

Granite

Granite (phaneritic felsic intrusive rock)

Dyed Agate (Silicon Dioxide (SiO2) with artificial colorants) — mineral

Dyed Agate

Silicon Dioxide (SiO2) with artificial colorants

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Pebble (likely Sandstone or Granitic Pebble) (Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)) — Rock (likely Sedimentary)

Pebble (likely Sandstone or Granitic Pebble)

Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)

Rock (likely Sedimentary)

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

Sandstone (Quartzose)

Arenite (SiO2 principal)

Brecciated Jasper (SiO2 (Silicon Dioxide)) — sedimentary

Brecciated Jasper

SiO2 (Silicon Dioxide)

Likely weathered river pebble (Indeterminate lithology; possibly fine-grained sandstone, siltstone, or chert) — sedimentary

Likely weathered river pebble

Indeterminate lithology; possibly fine-grained sandstone, siltstone, or chert

Dyed Agate Geode (Silicon Dioxide (SiO2) - Chalcedony variety) — mineral

Dyed Agate Geode

Silicon Dioxide (SiO2) - Chalcedony variety

Mixed mineral and rock collection (Predominantly quartz varieties, including amethyst, plus likely calcite, feldspar, mica, and miscellaneous polished stones) — mineral

Mixed mineral and rock collection

Predominantly quartz varieties, including amethyst, plus likely calcite, feldspar, mica, and miscellaneous polished stones