I do love the strange and unusual. A pendant I wear is a real jaw-dropper: a tooth from the largest shark that ever lived.
Megalodon became extinct approximately 2 million years ago. The earliest Megs dated back approximately 17 million years ago. Some Megaladon’s were 60 feet long and weighed 77 tons. And people thought JAWS was big!
Megalodon had 46 front row teeth, 24 in the upper jaw and 22 in the lower. 
Most sharks have at least six rows of teeth, so a Megalodon had about 276 teeth at any given time. The largest Megalodon tooth found was around 7.25 inches long.
Some scientists estimate that Megalodon ate about 2,500 pounds of food every day, including whales and other large fish. One of the theories is that Megalodon became extinct because they starved out due to elimination of their food supply–they almost ate the whales into extinction, thus causing their own end.
Megalodon lived throughout most of the ancient world’s oceans.
Megalodon had a 6 foot mouth. If Megalodon was still alive you would not want to go swimming in the ocean. You would be considered a small snack food for this shark!
If you ever get to the Mall of America go to their Underwater Adventure. There you would see and could stand inside of a reproduction set of Megalodon jaws.
The photo shown is of a bottom front tooth and is a bit over 6 inches. I wear it to some of my art shows. Price on the pendant shown is $650 firm. It is not posted on this website.