Fossiliferous Limestone (Coquina / Shell Limestone)
Biogenic Limestone (CaCO3)
sedimentary
Category
Sedimentary (Fossilized Organic Matter)
Browse sedimentary (fossilized organic matter) specimens identified by the Rock Identifier community.
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Chert (or Fossiliferous Limestone)
Microcrystalline Quartz (SiO2) / Calcium Carbonate (CaCO3)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of organic matter)
sedimentary
Fossil Shark Tooth
Selachimorpha (Chondrichthyes dental fossil)
sedimentary
Limestone (Porous/Travertine variant)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Amber
Succinite (with various hydrocarbon compositions)
mineral
Fossiliferous Limestone
Calcareous biomicrite / Calcium Carbonate (CaCO3)
sedimentary
Fossilized Shark Tooth
Bioapatite (Calcium Hydroxyapatite) replacement
mineral
Flint (Chert)
Silicon Dioxide (SiO2)
sedimentary
Agatized Chert / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Black Jasper (Black Stone / River Pebble)
Silicon Dioxide (SiO₂), Opaque variety of Chalcedony
sedimentary
Sand Tiger Shark Tooth Fossil
Carcharias taurus (fossilized tooth)
fossil
Septarian Nodule
Septarian Nodule (Calcite, Aragonite, and Limestone/Claystone)
sedimentary
Travertine / Tufa
Calcium Carbonate (CaCO3)
sedimentary
Travertine (Tufa)
Chemical Limestone (CaCO3)
sedimentary
Asphalt / Bituminous Aggregate
Bituminous mixture (Hydrocarbon-based sediment)
sedimentary
Sulfidic Mudstone with Pyrite/Goethite
Sulfidic Siltstone/Mudstone (FeS2)
sedimentary
Fossilized Shark Tooth
Carcharocles sp. (likely Lemon or Sand Tiger)
sedimentary
Moss Agate
Silicon Dioxide (Chalcedony variety) with green hornblende or chlorite inclusions - SiO2
gemstone
Tree Agate (also known as Dendritic Agate)
Silicon Dioxide with inclusions (SiO2 + Mn/Fe)
mineral
Amber
Succinite (Resinous fossilized tree sap)
Mineraloid
Chert (Jasper variation)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Petrified Wood (Silicified Wood)
fossil
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Fossilized Shark Tooth
Eocene Lamniformes (Mackerel Shark clade)
fossil
Fossilized Shark Tooth
Lamniformes (order) fossil
fossil
Flower Jasper
Agatized Fossil Coral / Chalcedony (SiO2)
sedimentary
Coal (most likely Bituminous or Anthracite)
Bituminous Coal (Grade of Coal), Anthracite (Grade of Coal)
Sedimentary Rock
Amber
Succinates (Organic Fossilized Resin)
mineral
Amber
Succinates (Organic Fossilized Resin)
mineraloid
Petoskey Stone
Hexagonaria percarinata (Fossilized Coral)
sedimentary
Olive Sea Shell Fossil
Oliva sp. (Calcium Carbonate, CaCO3)
fossil
Likely bituminous coal
Coal, predominantly carbon-rich organic matter; exact rank cannot be confirmed from the image
sedimentary
Weathered limestone fragment
Limestone, predominantly calcite (CaCO₃)
sedimentary
Green Moss Agate
Silicon Dioxide (SiO2) with inclusions of hornblende or chlorite
sedimentary
Dendritic Agate / Moss Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Shale
Shale (fine-grained clastic sedimentary rock)
Sedimentary
Pyrite in Shale
Iron Sulfide (FeS2) in Argillaceous Shale
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossil Bivalve / Ostreid Shell (Hag Stone / Perforated Pebble)
Phylum Mollusca, Class Bivalvia
fossil
Amber (Copal)
Succinite (fossilized tree resin)
mineral