Megalodon - Fossil tooth - 10 cm

Megalodon tooth. A completely natural tooth, very precious, huge, and with a beautiful shape and color.
Rediscovery of Java Island
Otodus megalodon (whose species name, megalodon, derives from Greek and means "great tooth"), commonly known as megalodon or megalo-donte, is an extinct species of giant shark that lived from the early Miocene to the early Pliocene, about 23–3.6 million years ago (Aquitian–Zanclean), whose large fossil teeth demonstrate that it had a cosmopolitan distribution. In the past it was thought that O. megalodon was a member of the family Lamnidae and a close relative of the great white shark (Carcharodon carcharias), but subsequent studies have reclassified it within the extinct family Otodontidae, a family that split from the lineage of the great white shark during the Early Cretaceous.

Estimates of the megalodon's size vary depending on the method used, with maximum total length projections ranging from 14.2 to 20.3 meters.