Ammonite Fossil
Ammonoidea (Calcium carbonate - CaCO3)
sedimentary
Category
Sedimentary (Fossilized Organic Matter)
Browse sedimentary (fossilized organic matter) specimens identified by the Rock Identifier community.
Amber
Succinite (fossilized resin)
mineral
Amber
Succinite (fossilized resin)
mineral
Amber
Succinite (Fossilized Resin C10H16O)
Organic Mineraloid
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Septarian Nodule (Dragon Stone)
Septarian concretion (composition: CaCO3 - Calcite, Aragonite, and Siderite/Limestone)
sedimentary
Picture Jasper
Silicon Dioxide (SiO2) - Opaque Chert/Quartzite variety
sedimentary
Sandstone (likely Fossilized Wood or Concrete Simulacrum)
Arenite / Silicified Wood / Anthropogenic Concrete
sedimentary
Moss Agate
Silicon Dioxide with inclusions (SiO2 + impurities)
mineral
Chert / Flint (with Crinoid Stem Molds)
Microcrystalline Quartz (SiO2)
sedimentary
Carnelian (Orange Chalcedony)
Silicon Dioxide (SiO2)
mineral
Fancy Jasper
Silicon dioxide (SiO2)
sedimentary
Fossil Shark Tooth
Carcharodon or Carcharias fossil (Vertebrate Fossil)
sedimentary
Amber
Succinicum (Organic compound, primarily C10H16O)
Organic Gemstone (Mineraloid)
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Yellow Jasper (Mookaite style)
Silicon Dioxide (SiO2) with Goethite/Hematite inclusions
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Amber
Succinates (Organic Fossilized Resin)
mineral
Amber
Amber (C10H16O)
mineral
Glauconitic Sandstone (Greensand)
Glauconitic Sandstone ((K, Na)(Fe3+, Al, Mg)2(Si, Al)4O10(OH)2)
sedimentary
Fossil Coral (Favosites)
Favosites (Order: Tabulata, Phylum: Cnidaria)
sedimentary
Amber
Succinite (fossilized resin)
mineraloid
Fossilized Megalodon Tooth Fragment
Otodus megalodon (Carcharocles megalodon fossil)
sedimentary
Graphite Schist
C (Carbonaceous Schist)
metamorphic
Amber
Succinite (fossilized resin)
mineral
Petrified Wood
Silicified wood (Quartz/Chalcedony/Opal replacing organic matter)
sedimentary
Chert (with Quartz vein)
Chert (Silicon Dioxide, SiO2)
sedimentary
Ferruginous Sandstone (Ironstone)
Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)
sedimentary
Coquina
Biogenic Limestone (Calcium Carbonate - CaCO3)
sedimentary
Fossilized Bone Fragment
Permineralized Vertebrate Fossil (Hydroxyapatite replaced by Minerals)
sedimentary
Zebra Marble
Metamorphosed Alabaster/Limestone (CaCO3)
metamorphic
Chert (variant Flint/Jasper)
Microcrystalline Opaline Silica (SiO2)
sedimentary
Fossilized Shark Tooth
Scapanorhynchus (Sand Tiger Shark relative)
sedimentary
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Mn/Fe/Chlorite)
mineral
Agate (Moss or Dendritic Agate)
Chalcedony (Silicon Dioxide, SiO2)
mineral
Travertine (often colloquially called Tufa)
Chemical Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Jasper
Agate/Jasper (Microcrystalline Quartz, SiO2)
sedimentary
Chert (Iron-Stained)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Fossil Coral (Rugose Coral Fragment)
Rugosa (extinct order of solitary and colonial corals)
sedimentary
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxides
mineral
River Stone (likely Mudstone or Siltstone)
Lutite (Clastic sedimentary rock composed of clay and silt-sized particles)
sedimentary
Amber
Succinite (fossilized resin)
mineral