fossil

Shark Tooth Fossil

Vertebrate fossilized tooth (Chondrichthyes)

Hardness varies around 5-7 depending on the degree of mineralization (apatite/silica replacement), color ranges from tan, grey, black, to brown, luster is dull to vitreous, crystal structure is microcrystalline phosphate or quartz replacement.

Identified August 3, 2026More fossil →

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Physical properties

Formation & geological history

Formed through the process of permineralization where minerals replace the original organic material of the tooth over millions of years, typically dating from the Cretaceous to Neogene periods.

Uses & applications

Collected by fossil enthusiasts, used in educational displays, and sometimes set into jewelry.

Geological facts

Shark teeth are shed by the thousands over a shark's lifetime, making them one of the most common vertebrate fossils found worldwide.

Field identification & locations

Found in marine sedimentary deposits, river gravel beds, and eroding coastal cliffs. Look for the distinct triangular or curved blade shape and smooth enameloid sheen.

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Fossilized Crinoid Stem in Limestone

Crinoidea (Class) in Calcium Carbonate (CaCO3) matrix

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Fossiliferous Limestone with Crinoid stems

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