Limestone with Bitumen/Chert
Calcite (CaCO3) containing organic hydrocarbons
sedimentary
Category
Sedimentary (Fossilized Organic Matter)
Browse sedimentary (fossilized organic matter) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Fossilized Organic Matter) in the encyclopedia
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Fossilized Coral
Cnidaria (Anthozoa), often replaced by Calcium Carbonate (CaCO3) or Silica (SiO2)
sedimentary
Fossilized Bone
Petrified Bone (Fluorapatite / Calcium Phosphate replacement)
fossil
Glauconitic Sandstone
Glauconitic Quartz Arenite (with K,Mg,Fe,Al silicate hydroxide)
sedimentary
Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions
mineral
Petrified Wood
Silicon Dioxide (SiO2) permineralized organic matter
sedimentary
Coal (Bituminous or Anthracite)
Carbonaceous Sedimentary Rock
sedimentary
Grass (Organic Matter/Soil)
Poaceae (family of monocotyledonous flowering plants)
Organic Materia (Not a rock or mineral)
Red Chert (Jasper)
Cryptocrystalline Quartz (SiO2) with iron oxide inclusions
sedimentary
Amber (in Matrix/Shale)
Amber (Fossilized Tree Resin)
mineral
Orthoceras Fossil Limestone
Orthoceras (extinct Cephalopod fossil) in Matrix
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron inclusions
sedimentary
Jasper (Red Jasper)
Silicon Dioxide (SiO₂)
sedimentary
Amber with Fossil Inclusion
Fossilized Tree Resin (Succinite)
fossil
Amber
Succinicum (C10H16O)
mineral
Fossilized Bone
Permineralized Bone (Vertebrate Fossil)
fossil
Fossil Shark Tooth Fragment
Elasmobranchii dentition (fragment)
fossil
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Weathered shale or mudstone
Clastic mudrock, chiefly clay minerals, quartz, and feldspar
sedimentary
Bituminous Coal
Organic Sedimentary Rock (Carbon-based)
sedimentary
Black Dolomite
Bituminous Dolomite (CaMg(CO3)2)
sedimentary
Chert (specifically Flint)
Silicon Dioxide (SiO2)
sedimentary
Anthracite
Anthracite Coal (Carbon)
sedimentary
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite on Limestone
Iron Disulfide (FeS2) in Calcium Carbonate (CaCO3) matrix
sedimentary (matrix) / mineral (inclusion)
Black Jasper (Black Onyx substitute)
Silicon Dioxide (SiO2) with carbonaceous impurities
sedimentary (microcrystalline quartz)
Chert (containing Fossil Mold)
Silicon dioxide (SiO2)
sedimentary
Sand Tiger Shark Tooth
Carcharias taurus (fossilized)
fossil
Shale
Clastic sedimentary rock (primarily clay and silt minerals)
sedimentary
Amber (Raw)
Succinite (Fossilized Resin)
mineraloid
Fossiliferous Kalkstein (Marl/Sandstone)
Fossiliferous calcarenite/siltstone
sedimentary
Fossilized Coral
Cnidaria fossil / Calcite-replaced coral
fossil
Possible flint or black chert
Microcrystalline quartz (SiO₂), likely chert/flint
sedimentary
Flint or chert
Microcrystalline quartz (SiO₂), commonly chalcedony with possible minor impurities
sedimentary
Rounded limestone pebble
Limestone, primarily calcite (CaCO₃), possibly micritic or fossiliferous
sedimentary
Shale (or Slate / Coal / Jet)
Laminated fine-grained sedimentary rock (predominantly clay minerals)
sedimentary
Chert (Arrowhead Preform)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Fossiliferous Limestone or Shale
Biomicrite (if limestone) or Fossiliferous Shale
sedimentary
Amber with inclusion
Amber (Fossilized Tree Resin)
mineral