Rock Identifier

Category

Sedimentary (Fossilized Organic Matter)

Browse sedimentary (fossilized organic matter) specimens identified by the Rock Identifier community.

Chert (Flint Nodules) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint Nodules)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

Bituminous Coal (with Anthracite or Vitrinite inclusion) (Organic-rich Sedimentary Rock (Carboniferous classification)) — sedimentary

Bituminous Coal (with Anthracite or Vitrinite inclusion)

Organic-rich Sedimentary Rock (Carboniferous classification)

Dragon Stone (Ohko Stone (Argillaceous sedimentary rock)) — sedimentary

Dragon Stone

Ohko Stone (Argillaceous sedimentary rock)

Petoskey Stone (Hexagonaria percarinata (Fossilized Rugose Coral)) — sedimentary

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

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

Petrified Wood

Silicified Wood (primarily SiO2)

Chert (specifically Blue Chert or Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Blue Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Anthracite Coal (Anthracite (Carbon based fossil fuel)) — metamorphic

Anthracite Coal

Anthracite (Carbon based fossil fuel)

Sandstone Concretion (Clastic sedimentary rock (primarily Quartz SiO2)) — sedimentary

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2)

Chert (specifically Flint or Gray Chert) (Silicon Dioxide (Microcrystalline Quartz), SiO2) — sedimentary

Chert (specifically Flint or Gray Chert)

Silicon Dioxide (Microcrystalline Quartz), SiO2

Amber (Succinite (specifically for Baltic Amber), Formula: C10H16O) — Organic Gemstone (often associated with Sedimentary sequences)

Amber

Succinite (specifically for Baltic Amber), Formula: C10H16O

Organic Gemstone (often associated with Sedimentary sequences)

Fossil Shell (Bivalve) (Phylum Mollusca, Class Bivalvia (typically composed of Calcium Carbonate / CaCO3)) — sedimentary

Fossil Shell (Bivalve)

Phylum Mollusca, Class Bivalvia (typically composed of Calcium Carbonate / CaCO3)

Baltic Amber (Succinite (Polmerized conifer resin)) — mineraloid

Baltic Amber

Succinite (Polmerized conifer resin)

Amber (Copal) (Succinite (fossilized tree resin)) — mineral

Amber (Copal)

Succinite (fossilized tree resin)

Amber (Fossilized Resin (C10H16O)) — mineral

Amber

Fossilized Resin (C10H16O)

Petrified Wood (Silicon Dioxide (SiO2) permineralized organic matter) — sedimentary

Petrified Wood

Silicon Dioxide (SiO2) permineralized organic matter

Shale (Shale (fine-grained clastic sedimentary rock)) — Sedimentary

Shale

Shale (fine-grained clastic sedimentary rock)

Petrified Wood (Silicified wood (primarily SiO2 - Silicon Dioxide/Quartz)) — metamorphic

Petrified Wood

Silicified wood (primarily SiO2 - Silicon Dioxide/Quartz)

Agatized Chert / Chalcedony (Silicon Dioxide (SiO2)) — sedimentary

Agatized Chert / Chalcedony

Silicon Dioxide (SiO2)

Yellow Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

Black Jasper (Black Stone / River Pebble) (Silicon Dioxide (SiO₂), Opaque variety of Chalcedony) — sedimentary

Black Jasper (Black Stone / River Pebble)

Silicon Dioxide (SiO₂), Opaque variety of Chalcedony

Fossilized Shell in Limestone (Bivalve fossil (CaCO3) in Carbonate Sedimentary Rock) — sedimentary

Fossilized Shell in Limestone

Bivalve fossil (CaCO3) in Carbonate Sedimentary Rock

Asphalt / Bituminous Aggregate (Bituminous mixture (Hydrocarbon-based sediment)) — sedimentary

Asphalt / Bituminous Aggregate

Bituminous mixture (Hydrocarbon-based sediment)

Petrified Wood (Silicified Wood (primarily SiO2 - Silicon Dioxide)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide)

Pyrite in Shale (Iron Sulfide (FeS2) in Argillaceous Shale) — sedimentary

Pyrite in Shale

Iron Sulfide (FeS2) in Argillaceous Shale

Megalodon Shark Tooth (Partial Fossil) (Otodus megalodon (fossilized in Calcium Phosphate/Apatite)) — Mineral/Fossil

Megalodon Shark Tooth (Partial Fossil)

Otodus megalodon (fossilized in Calcium Phosphate/Apatite)

Dendritic Agate / Moss Agate (Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions) — mineral

Dendritic Agate / Moss Agate

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Petoskey Stone (Hexagonaria percarinata (Fossilized Coral)) — sedimentary

Petoskey Stone

Hexagonaria percarinata (Fossilized Coral)

Green Moss Agate (Silicon Dioxide (SiO2) with inclusions of hornblende or chlorite) — sedimentary

Green Moss Agate

Silicon Dioxide (SiO2) with inclusions of hornblende or chlorite

Amber (Succinite (Resinous fossilized tree sap)) — Mineraloid

Amber

Succinite (Resinous fossilized tree sap)

Pyrite (Pyrite (Iron sulfide, FeS₂)) — Mineral

Pyrite

Pyrite (Iron sulfide, FeS₂)

Petrified Wood (Silicified Wood (primarily SiO₂ - Silicon Dioxide)) — metamorphic

Petrified Wood

Silicified Wood (primarily SiO₂ - Silicon Dioxide)

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

Green Sandstone (Glauconitic Sandstone) — sedimentary

Green Sandstone

Glauconitic Sandstone

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

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Tree Agate (also known as Dendritic Agate) (Silicon Dioxide with inclusions (SiO2 + Mn/Fe)) — mineral

Tree Agate (also known as Dendritic Agate)

Silicon Dioxide with inclusions (SiO2 + Mn/Fe)

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

Amber (Succinite) — Mineraloid

Amber

Succinite

Limestone (Porous/Travertine variant) (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Porous/Travertine variant)

Sedimentary Calcium Carbonate (CaCO3)

Amber (Succinite (specifically for Baltic Amber), Formula: C10H16O) — Mineraloid

Amber

Succinite (specifically for Baltic Amber), Formula: C10H16O

Jasper (specifically Polychrome or Desert Jasper) (Silicon Dioxide (SiO2) with iron oxide and other mineral impurities) — sedimentary (chemical/biological origin)

Jasper (specifically Polychrome or Desert Jasper)

Silicon Dioxide (SiO2) with iron oxide and other mineral impurities

sedimentary (chemical/biological origin)

Sandy Ironstone (Ferruginous Sandstone) — sedimentary

Sandy Ironstone

Ferruginous Sandstone