Rock Identifier

Category

Not A Natural Rock

Browse not a natural rock specimens identified by the Rock Identifier community.

Learn about Not A Natural Rock in the encyclopedia

Asphalt Rock

Rock Gypsum

Coral Rock

Rock Salt

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Chalk

Obsidian

Baddeleyite

Cataclasite

Anorthosite

Kimberlite

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Sandstone (Sandstone (clastic sedimentary rock, predominantly SiO2)) — sedimentary

Sandstone

Sandstone (clastic sedimentary rock, predominantly SiO2)

Sandstone (Clastic Sedimentary Rock (composed mostly of quartz, SiO2)) — sedimentary

Sandstone

Clastic Sedimentary Rock (composed mostly of quartz, SiO2)

Weathered quartz-rich rock, possibly chert or quartzite fragment (Indeterminate; likely microcrystalline quartz (SiO₂), possibly with iron-oxide staining) — metamorphic

Weathered quartz-rich rock, possibly chert or quartzite fragment

Indeterminate; likely microcrystalline quartz (SiO₂), possibly with iron-oxide staining

Granite (Granite (Phaneritic Quartz-Feldspar rock)) — igneous

Granite

Granite (Phaneritic Quartz-Feldspar rock)

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

Pink Granite

Granite (Phaneritic intrusive igneous rock)

River Rock (Basalt/Greywacke) (Aphanitic Basalt or Lithic Sandstone (Greywacke)) — igneous

River Rock (Basalt/Greywacke)

Aphanitic Basalt or Lithic Sandstone (Greywacke)

Siltstone (Yellow/Brown Sandstone or Siltstone) (Siltstone / Fine-grained Sandstone (rich in iron oxides like limonite)) — sedimentary

Siltstone (Yellow/Brown Sandstone or Siltstone)

Siltstone / Fine-grained Sandstone (rich in iron oxides like limonite)

Red Jasper (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Sandstone (Ferruginous) (Arenite (Fe-rich SiO2)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe-rich SiO2)

Smoky Quartz (Silicon Dioxide (SiO2) with aluminum impurities) — mineral

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Ventifact (Eolian Ventifact (often composed of basalt, chert, or quartzite)) — sedimentary

Ventifact

Eolian Ventifact (often composed of basalt, chert, or quartzite)

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

Granite

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

Sandstone (Ferruginous) (Arenite with Iron-Oxide Cement) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement

Clear Quartz (Milky Quartz pebble) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Milky Quartz pebble)

Silicon Dioxide (SiO2)

Basalt (Basalt (extrusive volcanic rock)) — igneous

Basalt

Basalt (extrusive volcanic rock)

Granite pebble (Granite, chiefly quartz, feldspar, and mica) — igneous

Granite pebble

Granite, chiefly quartz, feldspar, and mica

Amethyst (Amethyst (Silicon Dioxide, SiO2 + Fe4+)) — mineral

Amethyst

Amethyst (Silicon Dioxide, SiO2 + Fe4+)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Quartz (Smoky/Druzy variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky/Druzy variety)

Silicon Dioxide (SiO2)

Travertine (Ceramic Tile) (Terrestrial Sedimentary Rock / Calcium Carbonate (CaCO3)) — sedimentary

Travertine (Ceramic Tile)

Terrestrial Sedimentary Rock / Calcium Carbonate (CaCO3)

Granite (Phaneritic plutonic rock (Silica-rich)) — igneous

Granite

Phaneritic plutonic rock (Silica-rich)

Pink Granite (Phaneritic Felsic Igneous Plutonic Rock) — igneous

Pink Granite

Phaneritic Felsic Igneous Plutonic Rock

Granite (Phaneritic Felsic Igneous Rock (Granite)) — igneous

Granite

Phaneritic Felsic Igneous Rock (Granite)

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

Granite

Granite (Felsic intrusive igneous rock)

Hag Stone (Perforated Sedimentary Rock (typically Sandstone or Siltstone)) — sedimentary

Hag Stone

Perforated Sedimentary Rock (typically Sandstone or Siltstone)

Granite (Intrusive Felsic Igneous Rock) — igneous

Granite

Intrusive Felsic Igneous Rock

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Granite (Phaneritic intrusive igneous rock) — igneous

Granite

Phaneritic intrusive igneous rock

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Tumbled blue stone, likely blue aventurine or dyed quartzite (Quartz (SiO₂), likely with inclusions or artificial dye; exact identification requires testing) — mineral

Tumbled blue stone, likely blue aventurine or dyed quartzite

Quartz (SiO₂), likely with inclusions or artificial dye; exact identification requires testing

Dyed Blue Agate Slice (Silicon Dioxide (SiO2) - Variety Agate) — mineral

Dyed Blue Agate Slice

Silicon Dioxide (SiO2) - Variety Agate

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Sandstone (Red Sandstone) (Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)) — sedimentary

Sandstone (Red Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)

Smoky Quartz (with possible Feldspar inclusions) (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz (with possible Feldspar inclusions)

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Red Sandstone (Quartzose Sandstone (primarily quartz grains cemented by iron oxides)) — sedimentary

Red Sandstone

Quartzose Sandstone (primarily quartz grains cemented by iron oxides)

Slate (Slate (Metamorphic rock)) — metamorphic

Slate

Slate (Metamorphic rock)

Polished blue banded agate cabochon/ornamental slab (Microcrystalline quartz (chalcedony), SiO₂, with blue coloring or inclusions) — mineral

Polished blue banded agate cabochon/ornamental slab

Microcrystalline quartz (chalcedony), SiO₂, with blue coloring or inclusions

Sandstone (Arenite (SiO2 main component)) — sedimentary

Sandstone

Arenite (SiO2 main component)