Rock Identifier

Category

Organic Material

Browse organic material specimens identified by the Rock Identifier community.

Learn about Organic Material in the encyclopedia

Peat

Sapropel

Bituminous Shale

Bituminous Shale

Black Shale

Petrified Wood

Amber

Jet

Oil Shale

Pearl

Lizard Skin Jasper

Dunite

Opalized Wood

Jasper (Microcrystalline Quartz (SiO2 with iron oxide impurities)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2 with iron oxide impurities)

Green Jasper (Microcrystalline Quartz (SiO2) with mineral inclusions) — sedimentary

Green Jasper

Microcrystalline Quartz (SiO2) with mineral inclusions

Chert (Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (Flint Nodules) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Flint Nodules)

Chert (Silicon Dioxide, SiO2)

Chalcedony (Agatized Coral / Rough Chalcedony Node) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agatized Coral / Rough Chalcedony Node)

Silicon Dioxide (SiO2)

Chert Concretion with Iron Oxide Staining (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Concretion with Iron Oxide Staining

Microcrystalline Quartz (SiO2)

Chert (Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper)

Silicon Dioxide (SiO2)

Picture Jasper (SiO2) — mineral

Picture Jasper

SiO2

Bituminous coal (likely) (Coal, primarily carbon with macerals and variable mineral matter; commonly represented by approximate composition C-rich organic material) — sedimentary

Bituminous coal (likely)

Coal, primarily carbon with macerals and variable mineral matter; commonly represented by approximate composition C-rich organic material

Jasper (Silicon Dioxide (SiO2)) — mineral

Jasper

Silicon Dioxide (SiO2)

Yellow Jasper (Chert) (Silicon Dioxide (SiO2) with iron inclusions) — sedimentary

Yellow Jasper (Chert)

Silicon Dioxide (SiO2) with iron inclusions

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Petrified Wood (Silicified Wood (primarily Quartz/Chalcedony, SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, SiO2)

Fossilized Bone (Vertebrate fossil (mineralized bone)) — fossil

Fossilized Bone

Vertebrate fossil (mineralized bone)

Red Sandstone (Sandstone (Quartz Arenite / Arkose with Hematite cement)) — sedimentary

Red Sandstone

Sandstone (Quartz Arenite / Arkose with Hematite cement)

Petrified Wood (Silicified Wood (primarily SiO2)) — fossil

Petrified Wood

Silicified Wood (primarily SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Black Jasper (Etched) (Silicon Dioxide (SiO2) with impurities) — mineral

Black Jasper (Etched)

Silicon Dioxide (SiO2) with impurities

Chalcedony (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony

Cryptocrystalline Quartz (SiO2)

Fossil Coral (Scleractinia or Anthozoa (Fossilized)) — fossil

Fossil Coral

Scleractinia or Anthozoa (Fossilized)

Ironstone Concretion (Ironstone (primarily Siderite or Limonite)) — sedimentary

Ironstone Concretion

Ironstone (primarily Siderite or Limonite)

Red Jasper with Quartz (Microcrystalline Quartz (SiO2)) — sedimentary

Red Jasper with Quartz

Microcrystalline Quartz (SiO2)

Yellow Chert (Chalcedony) (Microcrystalline Quartz (SiO2)) — sedimentary

Yellow Chert (Chalcedony)

Microcrystalline Quartz (SiO2)

Fossilized Bone (Permineralized Vertebrate Bone) — fossil

Fossilized Bone

Permineralized Vertebrate Bone

Chert (often called Flint when found in chalk) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint when found in chalk)

Microcrystalline Quartz (SiO2)

Petrified Wood (Silicified Wood (primarily SiO2)) — fossil

Petrified Wood

Silicified Wood (primarily SiO2)

Jasper (Silicon Dioxide (Microcrystalline Quartz), SiO2) — sedimentary

Jasper

Silicon Dioxide (Microcrystalline Quartz), SiO2

Fossilized wood (petrified wood) (Silicified fossil wood; commonly quartz/chalcedony (SiO₂) replacing wood) — fossil

Fossilized wood (petrified wood)

Silicified fossil wood; commonly quartz/chalcedony (SiO₂) replacing wood

Amber-like beach pebble (Amber (fossilized tree resin), likely heavily weathered or resinous organic material; exact identification is uncertain from the image) — gemstone

Amber-like beach pebble

Amber (fossilized tree resin), likely heavily weathered or resinous organic material; exact identification is uncertain from the image

Shark Tooth Fossil (Carcharodon / Carcharocles species) — fossil

Shark Tooth Fossil

Carcharodon / Carcharocles species

Microcrystalline Quartz (Chert/Agate) (Silicon Dioxide (SiO2)) — sedimentary

Microcrystalline Quartz (Chert/Agate)

Silicon Dioxide (SiO2)

Fossilized Shark Tooth (Chondrichthyes (Class) - likely Carcharodon or Otodus genus) — fossil

Fossilized Shark Tooth

Chondrichthyes (Class) - likely Carcharodon or Otodus genus

Jasper (Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)) — sedimentary

Jasper

Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)

Chert with Iron Inclusions (Microcrystalline Quartz (SiO2) with Hematite/Limonite) — sedimentary

Chert with Iron Inclusions

Microcrystalline Quartz (SiO2) with Hematite/Limonite

Starfish Fossil (Asteroidea fossil) — fossil

Starfish Fossil

Asteroidea fossil

Fossil Shark Tooth (Chondrichthyes tooth fossil) — fossil

Fossil Shark Tooth

Chondrichthyes tooth fossil

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Green Jasper (Jasper (Silicates, SiO2)) — sedimentary

Green Jasper

Jasper (Silicates, SiO2)

Petrified Wood (Silicified Wood (primarily SiO2)) — mineral

Petrified Wood

Silicified Wood (primarily SiO2)

Chert (Jasper-bearing) (Microcrystalline silica (SiO2) with iron oxide inclusions) — sedimentary

Chert (Jasper-bearing)

Microcrystalline silica (SiO2) with iron oxide inclusions

Chert (Fossiliferous) (Silicon dioxide (SiO2)) — sedimentary

Chert (Fossiliferous)

Silicon dioxide (SiO2)

Chert (often found as Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often found as Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)