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

Granite (Granite (Silicic Plutonic Rock)) — igneous

Granite

Granite (Silicic Plutonic Rock)

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

Sandstone

Arenite (composed primarily of SiO2)

Druzy Quartz (Crystalline Silicon Dioxide (SiO2)) — mineral

Druzy Quartz

Crystalline Silicon Dioxide (SiO2)

Jasper and Agate (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper and Agate

Microcrystalline Quartz (SiO2)

Sandstone (Ferruginous) (Arenite (Fe-oxide enriched)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe-oxide enriched)

Silicon Carbide (Carborundum) (Silicon Carbide (SiC)) — mineral

Silicon Carbide (Carborundum)

Silicon Carbide (SiC)

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

Veined Sandstone with Calcite Veins (Sedimentary sandstone with hydrothermal/mineral veins) — sedimentary

Veined Sandstone with Calcite Veins

Sedimentary sandstone with hydrothermal/mineral veins

Flagstone (Sandstone) (Sandstone (Silicon Dioxide with variations of Iron Oxide/Calcium Carbonate)) — sedimentary

Flagstone (Sandstone)

Sandstone (Silicon Dioxide with variations of Iron Oxide/Calcium Carbonate)

Glauconite (Green Sandstone) (Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2) — sedimentary

Glauconite (Green Sandstone)

Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2

Boulder Opal (Hydrated Silica (SiO2·nH2O)) — mineraloid

Boulder Opal

Hydrated Silica (SiO2·nH2O)

Dragon's Breath (Mexican Opal Glass) (Artisan Foil Glass (SiO2 based)) — mineraloid

Dragon's Breath (Mexican Opal Glass)

Artisan Foil Glass (SiO2 based)

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

Sandstone (Pebble)

Arenite (primarily SiO2)

Green Aventurine (Quartz with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)) — mineral

Green Aventurine

Quartz with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Blue Howlite (Dyed) (Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)) — mineral

Blue Howlite (Dyed)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

River Cobble (Quartzite or Sandstone) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

River Cobble (Quartzite or Sandstone)

Clastic sedimentary rock (primarily SiO2)

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

Milky Quartz Pebble (Beach Agate / Quartz)

Silicon Dioxide (SiO2)

Blue Dyed Agate Geode (Slice) (Silicon Dioxide (SiO2) - Chalcedony / Quartz) — mineral

Blue Dyed Agate Geode (Slice)

Silicon Dioxide (SiO2) - Chalcedony / Quartz

Sandstone (Ferruginous) (Sandstone (primarily SiO2 with iron oxide cement Fe2O3)) — sedimentary

Sandstone (Ferruginous)

Sandstone (primarily SiO2 with iron oxide cement Fe2O3)

Granite (Phaneritic Igneous Rock (Granite)) — igneous

Granite

Phaneritic Igneous Rock (Granite)

Halite (Rock Salt) (Halite (NaCl)) — mineral

Halite (Rock Salt)

Halite (NaCl)

Black Pebble (Basalt / Chert) (SiO2 (if Chert) or Mafic Igneous Rock (if Basalt)) — igneous

Black Pebble (Basalt / Chert)

SiO2 (if Chert) or Mafic Igneous Rock (if Basalt)

Hag Stone (Perforated Sedimentary Rock (primarily Siltstone or Mudstone)) — sedimentary

Hag Stone

Perforated Sedimentary Rock (primarily Siltstone or Mudstone)

Siltstone with Fossil Cast (Sedimentary Rock (Siltstone / Fine-grained Sandstone)) — sedimentary

Siltstone with Fossil Cast

Sedimentary Rock (Siltstone / Fine-grained Sandstone)

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

Amethyst Cluster

Silicon Dioxide (SiO2) with iron impurities

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

Smoky Quartz (Tumbled)

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Turquoise in Matrix (Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)) — mineral

Turquoise in Matrix

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

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

Amethyst Cluster

Silicon Dioxide (SiO2 with iron impurities)

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

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

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

Amethyst Geode

Silicon Dioxide (SiO2) with iron impurities

Dyed Agate Geode Slice (Silicon Dioxide (SiO2)) — mineral

Dyed Agate Geode Slice

Silicon Dioxide (SiO2)

Green Aventurine (Aventurine Quartz (SiO2 with inclusions)) — metamorphic

Green Aventurine

Aventurine Quartz (SiO2 with inclusions)

Hag Stone (Perforated Sedimentary Rock (typically Flint or Limestone)) — sedimentary

Hag Stone

Perforated Sedimentary Rock (typically Flint or Limestone)

Druzy Quartz (Silicon Dioxide (SiO2)) — mineral

Druzy Quartz

Silicon Dioxide (SiO2)

Sandstone (Arenite (SiO2 based with quartz, feldspar, or lithic fragments)) — sedimentary

Sandstone

Arenite (SiO2 based with quartz, feldspar, or lithic fragments)

Sandstone (Sedimentary Rock (Quartz arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite)

Granite or granitic rock fragment (Felsic intrusive igneous rock, typically quartz + feldspar + mica; exact species uncertain from the image) — igneous

Granite or granitic rock fragment

Felsic intrusive igneous rock, typically quartz + feldspar + mica; exact species uncertain from the image

Blue Agate (Dyed) (Silicon Dioxide (SiO2)) — mineral

Blue Agate (Dyed)

Silicon Dioxide (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

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

Chert / River Pebble

Microcrystalline Quartz (SiO2)

Opalite crescent pendant (Opalite (man-made opalescent glass; not a natural mineral)) — gemstone

Opalite crescent pendant

Opalite (man-made opalescent glass; not a natural mineral)