Rock Identifier

Category

Organic Mineraloid

Browse organic mineraloid specimens identified by the Rock Identifier community.

Learn about Organic Mineraloid in the encyclopedia

Shungite

Sapropel

Bituminous Shale

Bituminous Shale

Black Shale

Petrified Wood

Amber

Jet

Oil Shale

Peat

Pearl

Lizard Skin Jasper

Opalized Wood

Chert (Flint) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Fossiliferous Sandstone Pebble (with Crinoid / Shell Impression) (Sandstone containing fossiliferous inclusions (SiO2 matrix with calcite/silica cast fossil)) — sedimentary

Fossiliferous Sandstone Pebble (with Crinoid / Shell Impression)

Sandstone containing fossiliferous inclusions (SiO2 matrix with calcite/silica cast fossil)

Glauconitic Sandstone (Glauconitic Quartz-Wacke / Sandstone (Fe(II),Fe(III),Al,Mg)2-3(Si,Al)4O10(OH)2) — sedimentary

Glauconitic Sandstone

Glauconitic Quartz-Wacke / Sandstone (Fe(II),Fe(III),Al,Mg)2-3(Si,Al)4O10(OH)2

Graphite-rich schist (likely graphite ore) (Graphite-bearing schist; predominantly graphitic carbon (C) with mica, quartz, and possible feldspar) — metamorphic

Graphite-rich schist (likely graphite ore)

Graphite-bearing schist; predominantly graphitic carbon (C) with mica, quartz, and possible feldspar

Shark Tooth Fossil (Carcharodon / Otodus fossilized tooth (Calcium Phosphate / Hydroxyapatite)) — fossil

Shark Tooth Fossil

Carcharodon / Otodus fossilized tooth (Calcium Phosphate / Hydroxyapatite)

Fossilized Bivalve Shell (Bivalvia (Phylum Mollusca)) — fossil

Fossilized Bivalve Shell

Bivalvia (Phylum Mollusca)

Fossilized Bivalve Shell (Fossilized Clam) (Bivalvia (class) / CaCO3 (Calcium Carbonate)) — fossil

Fossilized Bivalve Shell (Fossilized Clam)

Bivalvia (class) / CaCO3 (Calcium Carbonate)

Banded Chert / Agate (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert / Agate

Silicon Dioxide (SiO2)

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

Petrified Wood

Silicified wood (primarily quartz, SiO2)

Fossilized Shark Tooth (Chondrichthyes (Class)) — fossil

Fossilized Shark Tooth

Chondrichthyes (Class)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Fossilized Shark Tooth (Chondrichthyes (class) fossilized tooth) — fossil

Fossilized Shark Tooth

Chondrichthyes (class) fossilized tooth

Fossilized Bone / Dinosaur Fossil (Fossilized vertebrate bone (permineralized)) — fossil

Fossilized Bone / Dinosaur Fossil

Fossilized vertebrate bone (permineralized)

Banded Chert (likely Flint or Jasper variety) (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert (likely Flint or Jasper variety)

Silicon Dioxide (SiO2)

Calcareous Tufa (or Travertine) (Calcium Carbonate (CaCO3)) — sedimentary

Calcareous Tufa (or Travertine)

Calcium Carbonate (CaCO3)

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

Grey Chert River Pebble

Microcrystalline Quartz (SiO2)

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

Chert / Flint

Silicon Dioxide (SiO2)

Sand Tiger Shark Tooth (Carcharias taurus (fossilized)) — fossil

Sand Tiger Shark Tooth

Carcharias taurus (fossilized)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Green Chert (Jasper) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Green Chert (Jasper)

Cryptocrystalline Quartz (SiO2)

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

Petrified Wood

Silicified Wood (primarily SiO2)

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

Chert (Flint) Artifact

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Trace Fossil (Lichenandites or Rhynie Chert Chert with Microfossils) (Trace fossil in microcrystalline quartz (SiO2)) — fossil

Trace Fossil (Lichenandites or Rhynie Chert Chert with Microfossils)

Trace fossil in microcrystalline quartz (SiO2)

Jasper (Silicon dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with impurities

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

Chert (Yellow Jasper)

Microcrystalline Quartz (SiO2)

Jasper (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon Dioxide (SiO2) with impurities

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

Chert (and Flint)

Silicon Dioxide (SiO2)

Travertine (Tufa) (Travertine (Aragonite/Calcite form of Calcium Carbonate, CaCO3)) — sedimentary

Travertine (Tufa)

Travertine (Aragonite/Calcite form of Calcium Carbonate, CaCO3)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

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

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Chert (Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper)

Microcrystalline Quartz (SiO2)

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

Chert (Nodule)

Silicon Dioxide (SiO2)

Septarian Nodule (Micro-fragment) (Septarian Nodule / Concretion (CaCO3 + CaMg(CO3)2 + Quartz)) — sedimentary

Septarian Nodule (Micro-fragment)

Septarian Nodule / Concretion (CaCO3 + CaMg(CO3)2 + Quartz)

Chert (Yellow Jasper variant) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow Jasper variant)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper/Flint variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Travertine (Calcareous Tufa (CaCO3)) — sedimentary

Travertine

Calcareous Tufa (CaCO3)

Yellow Jasper (Silicon Dioxide (SiO₂)) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO₂)

Chert (Jasper/Flint variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Green Jasper (Silicon Dioxide (SiO2) with impurities of iron(II) silicate) — sedimentary

Green Jasper

Silicon Dioxide (SiO2) with impurities of iron(II) silicate