Rock Identifier

Category

Organic Materia (Not A Rock Or Mineral)

Browse organic materia (not a rock or mineral) specimens identified by the Rock Identifier community.

Learn about Organic Materia (Not A Rock Or Mineral) in the encyclopedia

Rock Salt

Rock Gypsum

Coral Rock

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Emerald in Matrix

Emerald in Matrix

Aquamarine Matrix

Aquamarine Matrix

Sapropel

Halite

Black Shale

Bituminous Shale

Bituminous Shale

Siltstone with plant fossil impression (Sedimentary rock with Archaeopteris or Calamites flora impression) — fossil

Siltstone with plant fossil impression

Sedimentary rock with Archaeopteris or Calamites flora impression

Chert (Gravel) (Chert (Microcrystalline Silicon Dioxide, SiO2)) — sedimentary

Chert (Gravel)

Chert (Microcrystalline Silicon Dioxide, SiO2)

Fossiliferous Limestone (Fossiliferous Carbonate Rock (CaCO3)) — sedimentary

Fossiliferous Limestone

Fossiliferous Carbonate Rock (CaCO3)

Chert (Brown Variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Brown Variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Amber (Succinite (C10H16O)) — mineraloid

Amber

Succinite (C10H16O)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Graphite (Graphite (Carbon, C)) — mineral

Graphite

Graphite (Carbon, C)

Coal (Bituminous Coal / Anthracite) — sedimentary

Coal

Bituminous Coal / Anthracite

Fossilized Gastropod / Coral (Phylum Mollusca / Cnidaria (Silicified or Calcified)) — fossil

Fossilized Gastropod / Coral

Phylum Mollusca / Cnidaria (Silicified or Calcified)

Fossiliferous Limestone with Coral Imprint (Fossiliferous Limestone (CaCO3)) — sedimentary

Fossiliferous Limestone with Coral Imprint

Fossiliferous Limestone (CaCO3)

Petrified Wood / Fossilized Bone (Silicified / Mineralized Fossil (Silica SiO2)) — fossil

Petrified Wood / Fossilized Bone

Silicified / Mineralized Fossil (Silica SiO2)

Pyrite Concretion (Iron Sulfide (FeS2) in Sedimentary Matrix) — sedimentary

Pyrite Concretion

Iron Sulfide (FeS2) in Sedimentary Matrix

Quartz Geode in Chert/Limestone Matrix (Silicon Dioxide (SiO2) within Sedimentary Host Rock) — sedimentary

Quartz Geode in Chert/Limestone Matrix

Silicon Dioxide (SiO2) within Sedimentary Host Rock

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

Chert (Flint Nodules)

Silicon Dioxide (SiO2)

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

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (often called Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Graphite (Graphite (Carbon, C)) — Mineral

Graphite

Graphite (Carbon, C)

Jasper (Jasper (Cryptocrystalline variety of Quartz, SiO2)) — sedimentary

Jasper

Jasper (Cryptocrystalline variety of Quartz, SiO2)

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Pyrite (Fool's Gold) Cube (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold) Cube

Iron Sulfide (FeS2)

Chert / Flint (Chert (Cryptocrystalline Silica, SiO2)) — sedimentary

Chert / Flint

Chert (Cryptocrystalline Silica, SiO2)

Stromatolite (Biogenic Sedimentary Rock (composed predominantly of CaCO3)) — sedimentary

Stromatolite

Biogenic Sedimentary Rock (composed predominantly of CaCO3)

Limestone with Iron Oxide Staining (Sedimentary Rock (Calcite, CaCO3)) — sedimentary

Limestone with Iron Oxide Staining

Sedimentary Rock (Calcite, CaCO3)

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

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Yellow Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Yellow Chert

Microcrystalline Quartz (SiO2)

Chert (White Chert or Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (White Chert or Flint)

Microcrystalline Quartz (SiO2)

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

Grey Chert River Pebble

Microcrystalline Quartz (SiO2)

Black Pearl (Tahitian Pearl) (Aragonite / Calcite (CaCO3) with Conchiolin) — mineral

Black Pearl (Tahitian Pearl)

Aragonite / Calcite (CaCO3) with Conchiolin

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Chert (Flint) (Chert (Cryptocrystalline Silica, SiO2)) — sedimentary

Chert (Flint)

Chert (Cryptocrystalline Silica, SiO2)

Chert (often called Flint in dark varieties) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint in dark varieties)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Limestone pebble (Sedimentary rock, primarily calcium carbonate (CaCO3)) — sedimentary

Limestone pebble

Sedimentary rock, primarily calcium carbonate (CaCO3)

Shark Tooth Fossil (Carcharocles megalodon or similar extinct shark tooth) — fossil

Shark Tooth Fossil

Carcharocles megalodon or similar extinct shark tooth

Banded Chert (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert

Silicon Dioxide (SiO2)

Chert (Nodular) (Chert (SiO2 - Microcrystalline Quartz)) — sedimentary

Chert (Nodular)

Chert (SiO2 - Microcrystalline Quartz)

Chert (Jasper/Chalcedony Pebble) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Chalcedony Pebble)

Silicon Dioxide (SiO2)

Chert (Polished/Worn) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Polished/Worn)

Microcrystalline quartz (SiO2)

Pearl (Calcium Carbonate (CaCO3) with Conchiolin) — mineral

Pearl

Calcium Carbonate (CaCO3) with Conchiolin

Banded Chert (Chert (Silicon Dioxide, SiO2)) — sedimentary

Banded Chert

Chert (Silicon Dioxide, SiO2)

Chert (Limestone/Flint variant) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Limestone/Flint variant)

Microcrystalline or cryptocrystalline Quartz (SiO2)