Petrified Wood (Silicified Fossil)
Silicified Wood (SiO2)
sedimentary
Category
Organic Specimen (Fossil)
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Petrified wood (polished/cut slab)
Silicified fossil wood, commonly quartz/chalcedony (SiO₂) replacing wood tissue
fossil
Fossiliferous Siltstone
Clastic Sedimentary Rock with Fossil Inclusions
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2 - Silicon Dioxide)
sedimentary
Chert (Quartz Pebble)
Silicon Dioxide (SiO2)
sedimentary
Polished fossiliferous limestone
Bioclastic carbonate rock, primarily calcite (CaCO₃)
sedimentary
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Chert (River Pebble)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Fossilized bone fragment
Petrified bone, mineral-replaced vertebrate bone; exact taxon indeterminate
fossil
Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Amber
Succinite (fossilized resin, C10H16O)
mineral
Ironstone concretion / Limonitic Sandstone
Goethite/Hematite Cemented Sandstone (Hydrated Iron Oxide)
sedimentary
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Mosasaur Tooth Fossil
Mosasaurid vertebrate fossil (Hydroxyapatite)
mineral
Petrified Wood
Silicified Wood (SiO2 - Quartz/Chalcedony replacement)
Mineral / Fossil
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossiliferous Limestone
Sedimentary rock containing Indeterminate Fossil remains (likely Crinoid stem or Bryozoan fragment)
fossil
Bivalve Fossil (Brachiopod or Scallop)
Class Bivalvia (or potentially Phylum Brachiopoda)
fossil
Chert Fossil (Pebble)
Microcrystalline Quartz (SiO2) with biogenic inclusions
sedimentary
Fossil Shark Tooth
Selachii fossil
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossiliferous Limestone (Coquina)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Fossilized Bone
Vertebrate fossil (mineralized bone)
fossil
Coquina (Fossiliferous Limestone)
Coquina (Organic Clastic Limestone)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Polished petrified wood
Silicified wood; commonly quartz/chalcedony (SiO₂) replacing cellular tissue
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Petrified Bone (Fossil Bone)
Per mineralization fossil bone (varies by organism, predominantly replacement by SiO2 - Quartz/Chalcedony)
fossil
Fossilized Tooth
Vertebrate Fossilized Tooth (Mineralized Biogenic Material)
fossil
Fossilized Rugose Coral in Limestone
Order Rugosa in Sedimentary Matrix (CaCO3)
fossil
Fossiliferous Limestone (Coquina)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Fossil Shark Tooth
Carcharodon or Carcharias fossil (Vertebrate Fossil)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Ferruginous Sandstone Concretion (Ironstone Phosphorite)
Ferruginous Sandstone (variable Fe-oxide/hydroxide composition)
sedimentary