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

Amber (Succiniferous organic material (Succinite)) — fossil

Amber

Succiniferous organic material (Succinite)

Amber (fossil resin) (Fossilized plant resin; organic material, not a mineral) — fossil

Amber (fossil resin)

Fossilized plant resin; organic material, not a mineral

Amber (Succinite) — Mineraloid

Amber

Succinite

Travertine (Terrestrial Sedimentary Limestone (CaCO3)) — sedimentary

Travertine

Terrestrial Sedimentary Limestone (CaCO3)

Amber (Green variation) (Succinite) — fossil

Amber (Green variation)

Succinite

Moss agate (likely plume or dendritic agate) (Chalcedony, microcrystalline quartz (SiO₂), with iron-oxide inclusions) — mineral

Moss agate (likely plume or dendritic agate)

Chalcedony, microcrystalline quartz (SiO₂), with iron-oxide inclusions

Polished golden-brown cabochon, possibly amber (Unidentified; amber is fossilized resin (organic material), not a mineral) — gemstone

Polished golden-brown cabochon, possibly amber

Unidentified; amber is fossilized resin (organic material), not a mineral

Fossil tooth (Mineralized vertebrate tooth; exact animal and species cannot be determined from the image) — fossil

Fossil tooth

Mineralized vertebrate tooth; exact animal and species cannot be determined from the image

Possible smooth beach pebble (identity uncertain) (Unidentified fine-grained siliceous pebble; possibly chert or quartzite) — sedimentary

Possible smooth beach pebble (identity uncertain)

Unidentified fine-grained siliceous pebble; possibly chert or quartzite

Fossilized Dinosaur Egg (Fossilized Ovum) — fossil

Fossilized Dinosaur Egg

Fossilized Ovum

Fossiliferous Chert (with Fossil Shells) (Silicon Dioxide (SiO2) with biogenic inclusions) — sedimentary

Fossiliferous Chert (with Fossil Shells)

Silicon Dioxide (SiO2) with biogenic inclusions

Travertine (Calcareous Tufa / Travertine (CaCO3)) — sedimentary

Travertine

Calcareous Tufa / Travertine (CaCO3)

Petrified Wood (Fossilized Xylem (SiO2)) — fossil

Petrified Wood

Fossilized Xylem (SiO2)

Fossilized Wood (Petrified Wood (Silicified Wood)) — fossil

Fossilized Wood

Petrified Wood (Silicified Wood)

Petrified Wood (Silicified wood (SiO2)) — sedimentary

Petrified Wood

Silicified wood (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified wood (SiO2)) — fossil

Petrified Wood

Silicified wood (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified wood (primarily quartz, SiO2)) — fossil

Petrified Wood

Silicified wood (primarily quartz, SiO2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified wood (SiO2)) — fossil

Petrified Wood

Silicified wood (SiO2)

Pearl necklace (Pearl, primarily aragonite (CaCO₃) and conchiolin) — gemstone

Pearl necklace

Pearl, primarily aragonite (CaCO₃) and conchiolin

Chert (varieties include Flint and Jasper) (Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)) — sedimentary

Chert (varieties include Flint and Jasper)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Ambergris (Geological/Organic Specimen) (Ambra grisea (Produced by Physeter macrocephalus)) — organic material

Ambergris (Geological/Organic Specimen)

Ambra grisea (Produced by Physeter macrocephalus)

organic material

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Polished moss agate (likely) (Chalcedony, microcrystalline quartz (SiO₂), with dark mineral inclusions) — mineral

Polished moss agate (likely)

Chalcedony, microcrystalline quartz (SiO₂), with dark mineral inclusions

Yellow cabochon, likely amber or yellow glass/resin (Unconfirmed; possibly amber (fossilized tree resin, an amorphous organic material)) — gemstone

Yellow cabochon, likely amber or yellow glass/resin

Unconfirmed; possibly amber (fossilized tree resin, an amorphous organic material)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Slate (Slate (foliated metamorphic rock, primarily composed of quartz, illite, chlorite, and micas)) — metamorphic

Slate

Slate (foliated metamorphic rock, primarily composed of quartz, illite, chlorite, and micas)

Calcite-rich limestone (Limestone, predominantly calcium carbonate (CaCO₃), usually calcite) — sedimentary

Calcite-rich limestone

Limestone, predominantly calcium carbonate (CaCO₃), usually calcite

Fossilized bone fragment (Fossil bone, composed chiefly of carbonate-fluorapatite (bioapatite)) — fossil

Fossilized bone fragment

Fossil bone, composed chiefly of carbonate-fluorapatite (bioapatite)

Dinosaur Claw Fossil (Fossilized Theropod Claw (Vertebrate Palaeontological Specimen)) — fossil

Dinosaur Claw Fossil

Fossilized Theropod Claw (Vertebrate Palaeontological Specimen)

Brown translucent mineral fragment, possibly iron-stained quartz or amber (Uncertain; likely quartz (SiO₂) with iron-oxide staining, though amber (fossilized resin) is possible) — mineral

Brown translucent mineral fragment, possibly iron-stained quartz or amber

Uncertain; likely quartz (SiO₂) with iron-oxide staining, though amber (fossilized resin) is possible

Petrified wood (Silicified fossil wood; commonly quartz (SiO₂) replacing wood tissue) — fossil

Petrified wood

Silicified fossil wood; commonly quartz (SiO₂) replacing wood tissue

Petrified wood (Silicified fossil wood; commonly quartz (SiO₂) replacing woody tissue) — fossil

Petrified wood

Silicified fossil wood; commonly quartz (SiO₂) replacing woody tissue

Amber (Succinite / Fossilized Resin (C10H16O)) — fossil

Amber

Succinite / Fossilized Resin (C10H16O)

Petrified wood (possible) (Silicified wood; fossilized tree tissue, commonly replaced by microcrystalline quartz (SiO₂)) — fossil

Petrified wood (possible)

Silicified wood; fossilized tree tissue, commonly replaced by microcrystalline quartz (SiO₂)

Fossiliferous Flint (Microcrystalline Quartz (SiO2) with Echinoid Fossil) — sedimentary

Fossiliferous Flint

Microcrystalline Quartz (SiO2) with Echinoid Fossil

Tumbled chalcedony (likely moss or dendritic agate) (Microcrystalline quartz, SiO₂, with iron-oxide inclusions) — mineral

Tumbled chalcedony (likely moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

Polished fossilized wood (petrified wood), likely agatized (Silicified wood; predominantly microcrystalline quartz/chalcedony (SiO₂), with iron-oxide coloration) — fossil

Polished fossilized wood (petrified wood), likely agatized

Silicified wood; predominantly microcrystalline quartz/chalcedony (SiO₂), with iron-oxide coloration