Rock Identifier

Category

Mineral, Sediment

Browse mineral, sediment specimens identified by the Rock Identifier community.

Learn about Mineral, Sediment in the encyclopedia

Sea Sediment Jasper

Claystone

Sapropel

Phosphorite

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Brookite

Talc

Mammoth or Mastodon Tooth Fragment (Mammuthus / Mammut molar fragment) — fossil

Mammoth or Mastodon Tooth Fragment

Mammuthus / Mammut molar fragment

Mosasaur Tooth Fossil (Mosasauridae (likely Prognathodon or Mosasaurus)) — fossil

Mosasaur Tooth Fossil

Mosasauridae (likely Prognathodon or Mosasaurus)

Fossilized Shark Tooth (Carcharodon carcharias (fossilized) / Hydroxyapatite permineralized with silica or iron) — sedimentary

Fossilized Shark Tooth

Carcharodon carcharias (fossilized) / Hydroxyapatite permineralized with silica or iron

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Greenstone / Graywacke (Lithic Sandstone (Graywacke)) — sedimentary

Greenstone / Graywacke

Lithic Sandstone (Graywacke)

Pyritized Ammonite (Ammonitida (replaced by Iron Disulfide, FeS2)) — sedimentary

Pyritized Ammonite

Ammonitida (replaced by Iron Disulfide, FeS2)

Weathered iron-rich sandstone or conglomeratic sedimentary cobble (Ferruginous sandstone, possibly polymictic conglomerate) — sedimentary

Weathered iron-rich sandstone or conglomeratic sedimentary cobble

Ferruginous sandstone, possibly polymictic conglomerate

Jasper (likely red/brown jasper) (Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides) — mineral

Jasper (likely red/brown jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides

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

Yellow Quartz / Quartz Pebble

Silicon Dioxide (SiO2)

Amber (Succinite (Fossilized Tree Resin) - C10H16O) — mineral

Amber

Succinite (Fossilized Tree Resin) - C10H16O

Sandstone (Water-worn Pebble) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Water-worn Pebble)

Clastic Sedimentary Rock (primarily SiO2)

River Stone (Basalt or Siltstone) (Mafic Volcanic Rock or Clastic Sedimentary Rock) — igneous or sedimentary

River Stone (Basalt or Siltstone)

Mafic Volcanic Rock or Clastic Sedimentary Rock

igneous or sedimentary

Fossiliferous Limestone (Calcium Carbonate - CaCO3) — sedimentary

Fossiliferous Limestone

Calcium Carbonate - CaCO3

Petrified Bone (Fossil Bone) (Per mineralization fossil bone (varies by organism, predominantly replacement by SiO2 - Quartz/Chalcedony)) — fossil

Petrified Bone (Fossil Bone)

Per mineralization fossil bone (varies by organism, predominantly replacement by SiO2 - Quartz/Chalcedony)

Shungite (Non-crystalline carbon (C)) — mineral

Shungite

Non-crystalline carbon (C)

Quartz (Iron-Stained Quartz Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-Stained Quartz Pebble)

Silicon Dioxide (SiO2)

Green Adventurine (Quartz (SiO2) with Fuchsite inclusions) — mineral

Green Adventurine

Quartz (SiO2) with Fuchsite inclusions

Banded River Rock with Quartz Vein (Siltstone/Greywacke with Quartz (SiO2)) — sedimentary

Banded River Rock with Quartz Vein

Siltstone/Greywacke with Quartz (SiO2)

Red Sandstone (Ferruginous Sandstone (SiO2 with Fe2O3)) — sedimentary

Red Sandstone

Ferruginous Sandstone (SiO2 with Fe2O3)

Conglomerate (Conglomerate) — sedimentary

Conglomerate

Conglomerate

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Limonite Concretion (Goethite-rich Concretion (FeO(OH))) — sedimentary

Limonite Concretion

Goethite-rich Concretion (FeO(OH))

Brecciated Red Jasper (Microcrystalline Quartz (Chalcedony), SiO2) — sedimentary

Brecciated Red Jasper

Microcrystalline Quartz (Chalcedony), SiO2

Banded Sandstone (Clastic Sandstone (SiO2 with iron oxides)) — sedimentary

Banded Sandstone

Clastic Sandstone (SiO2 with iron oxides)

Fossiliferous Sandstone (with Brachiopod or Bivalve mold) (Clastic Sedimentary Rock with Macrofossil Mold) — sedimentary

Fossiliferous Sandstone (with Brachiopod or Bivalve mold)

Clastic Sedimentary Rock with Macrofossil Mold

Shark Tooth Fossil (Chondrichthyes fossil) — fossil

Shark Tooth Fossil

Chondrichthyes fossil

Yellow Aventurine (Silicon Dioxide (Quartz with Mica inclusions) SiO2) — mineral

Yellow Aventurine

Silicon Dioxide (Quartz with Mica inclusions) SiO2

Fossil shark teeth (Likely fossilized shark teeth, possibly Carcharhiniformes or related sharks; exact species cannot be determined from the photo.) — fossil

Fossil shark teeth

Likely fossilized shark teeth, possibly Carcharhiniformes or related sharks; exact species cannot be determined from the photo.

Petrified Wood (Agatized/Silicified Wood) (Silicified Wood / Chalcedony (SiO2)) — sedimentary

Petrified Wood (Agatized/Silicified Wood)

Silicified Wood / Chalcedony (SiO2)

Tumbled River Pebble (Quartzite / Agate) (Silicon Dioxide (SiO2)) — sedimentary

Tumbled River Pebble (Quartzite / Agate)

Silicon Dioxide (SiO2)

Fossiliferous Limestone (Gritstone/Marl) (CaCO3 (Calcium Carbonate) with Fossil Inclusions) — sedimentary

Fossiliferous Limestone (Gritstone/Marl)

CaCO3 (Calcium Carbonate) with Fossil Inclusions

Sandstone (Sandstone (clastic sedimentary rock)) — sedimentary

Sandstone

Sandstone (clastic sedimentary rock)

Fossil Shark Tooth (Carcharhiniformes fossil (likely Carcharhinidae family)) — fossil

Fossil Shark Tooth

Carcharhiniformes fossil (likely Carcharhinidae family)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Fossil trilobite, likely enrolled specimen (Trilobita; exact genus/species cannot be determined from the image) — fossil

Fossil trilobite, likely enrolled specimen

Trilobita; exact genus/species cannot be determined from the image

Almandine Garnet (Almandine (Fe3Al2(SiO4)3)) — mineral

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Garnet (Almandine) (Almandine (Fe3Al2(SiO4)3)) — mineral

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Biotite in Host Matrix (Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)) — mineral

Biotite in Host Matrix

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

Rhodonite (Manganese silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese silicate (Mn,Fe,Mg,Ca)SiO3

Phyllite with Quartz Vein (Metamorphic Phyllite) — metamorphic

Phyllite with Quartz Vein

Metamorphic Phyllite

Fossilized Shark Teeth (Otodus sp. (Eocene Sand Tiger/Mackerel Shark)) — fossil

Fossilized Shark Teeth

Otodus sp. (Eocene Sand Tiger/Mackerel Shark)

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)