Amber
Succinite / Fossilized Resin (C10H16O)
fossil
Category
Mineralized Fossil
Browse mineralized fossil specimens identified by the Rock Identifier community.
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Fossilized Bone
Petrified Bone (Fluorapatite / Calcium Phosphate replacement)
fossil
Sandstone
Arenite (SiO2 based with mineral cement)
sedimentary
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Polished fossiliferous limestone
Bioclastic limestone, commonly crinoidal limestone (calcite, CaCO₃)
sedimentary
Mammoth Tooth
Mammuthus tooth
fossil
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone (with Chert/Quartzite nodules)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Fossiliferous Limestone / Petrifaction
Sedimentary rock with fossil inclusions / Calcium Carbonate (CaCO3)
fossil
Sandstone (Calcareous or Quartz-rich)
Arenite
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Iron Oxide staining)
sedimentary
Concretion
Septarian or Siderite Concretion
sedimentary
Limitation Concretion
Ironstone Concretion (Goethite/Limonite)
sedimentary
Rounded gray pebble
Uncertain; likely quartz-rich sandstone, quartzite, or graywacke
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Calligraphy Stone
Fossiliferous Limestone (containing Hematite and Shells)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Dendritic Agate (Tree Agate)
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Bioclasts
sedimentary
Sandstone (Ferruginous)
Clastic Sedimentary Rock (Sandstone)
sedimentary
Fossilized Shark Tooth (Otodus)
Otodus obliquus
fossil
Red Sandstone
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Milky Quartz with Dendritic Inclusions
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Graywacke or Lithic Sandstone)
Clastic Sedimentary Rock
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
sedimentary
Petrified Wood
Silicified wood (Quartz replacement of organic wood structure)
fossil
Fossilized bivalve shell fragment
Fossil Mollusca, likely a bivalve (class Bivalvia); exact genus cannot be determined from the image
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossil Shark Tooth
Odontaspididae (likely Carcharias sp.)
fossil
Asphalt Concrete
Bituminous Concrete (Anthropic Rock)
sedimentary
Coral Fossil / Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
fossil
Fossilized Sea Urchin (Echinoid)
Echinoidea (Class); commonly Clypeasteroida for sand dollar types
sedimentary (fossil)
Echinoid Fossil / Fossilized Sea Urchin
Echinoidea
fossil
Sandstone (lithic/arkosic)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Amber
Succinite (fossilized tree resin)
fossil
Sandstone (likely Quartzite-grade)
Arenite (primarily SiO2)
sedimentary