Fossil brachiopod shell
Brachiopoda; likely a ribbed strophomenid or productid brachiopod
fossil
Category
Organic Specimen (Fossil)
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Fossiliferous limestone
Bioclastic carbonate rock, predominantly calcite (CaCO₃)
sedimentary
Amber (Copal)
Succinate (Fossilized Tree Resin)
mineraloid
Petrified Wood
Silicified Wood (SiO2)
fossil
Limestone Pebble
Sedimentary carbonate rock (CaCO3)
sedimentary
Shark Tooth Fossil
Carcharodon / Otodus fossilized tooth (Calcium Phosphate / Hydroxyapatite)
fossil
Olive Sea Shell Fossil
Oliva sp. (Calcium Carbonate, CaCO3)
fossil
Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Polished moss agate
Moss agate, a variety of chalcedony (microcrystalline quartz, SiO₂)
gemstone
Petrified Wood
Silicified Wood (primarily SiO₂ - Silicon Dioxide)
metamorphic
Fossilized Bone
Permineralized Vertebrate Fossil
sedimentary
Polished fossiliferous limestone, possibly coral or shell fossil
Calcite-rich limestone (CaCO₃), with probable fossilized skeletal structures
fossil
Petrified Wood
Silicified Wood (mainly Quartz/Chalcedony, SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Orthoceras Fossil Limestone
Orthoceras (extinct Cephalopod fossil) in Matrix
sedimentary
Chalcedony (Common Opal variant)
Silicon dioxide (SiO2) with varying levels of hydration
mineral
Fossil Shark Tooth
Carcharodon sp. (likely Otodus or similar Lamniformes order)
sedimentary
Shark Tooth Fossil
Carcharocles megalodon or similar fossilized shark tooth
fossil
Fossilized Bone
Petrified Bone / Biogenic Sedimentary
fossil
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Likely vertebra fossil or bone fragment
Indeterminate fossilized vertebra; mineralized hydroxyapatite, commonly Ca₅(PO₄)₃(OH)
fossil
Fossiliferous Limestone containing a Brachiopod or Mollusk Impression
Biogenic Sedimentary Rock / Fossiliferous Limestone
sedimentary
Fossilized Coral
Cnidaria (Hexacorallia)
fossil
Fossilized Bivalve Shell
Bivalvia (Phylum Mollusca)
fossil
Ironstone Concretion (Limonite/Goethite)
Goethite/Limonite concretion (FeO(OH)·nH2O)
sedimentary
Dinosaur Fossil Tooth
Vertebrate Fossilized Tooth
fossil
Fossil Shark Tooth
Selachii (fossilized dentition)
fossil
Fossilized Coral
Cnidaria fossil / Calcite-replaced coral
fossil
Weathered fossiliferous sandstone or mudstone cobble
Lithified siliciclastic sediment; the raised curved feature may be a trace fossil or shell impression
sedimentary
Fossiliferous Chert or Agate
Microcrystalline quartz (SiO2) with fossiliferous inclusions
sedimentary
Fossilized Tooth Fragment
Vertebrate Fossil (Mammalia indet.)
fossil
Fossiliferous Limestone
Biogenic Limestone (CaCO3 with fossil fragments)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossilized Shark Tooth or Bone Fragment
Vertebrate Fossil (likely Carcharodon or similar genus)
fossil
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Fossil Shark Tooth
Chondrichthyes (class)
fossil
Fossilized Crab Carapace (Concretion)
Decapoda (fossil), typically preserved in calcite or siderite concretion
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony - SiO2)
sedimentary
Petrified Wood
Siliconized Wood (SiO2)
sedimentary
Shark Tooth Fossil
Vertebrate fossilized tooth (Chondrichthyes)
fossil
Sandstone with Trace Fossils
Quartz Arenite with Bioturbation (Trace Fossils)
sedimentary
Sandstone Concretion
Limonitic Sandstone Concretion
sedimentary