Elephant ivory tusk (public display, Warther Museum, Dover, Ohio, USA)
Ivory is a type of biogenic gem. It is composed of hydrous calcium phosphate-carbonate and comes from the tusks of certain mammals, such as elephants and hippos. Paleoivory is derived from fossil mammoth tusks.
Classification: Animalia, Chordata, Vertebrata, Mammalia, Proboscidea, Elephantidae
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