Shark tooth ID

[indominus rex]

My friend has always had this tooth in his collection that he found in gravel that was in a garden in Paris, it is obviously a shark tooth but we have no clue as to what species it is. And it would be helpful if someone could tell me what species of prehistoric shark it is.

 

[Troodon]

Looks like a Sand Tiger Shark hard to say more than that with no locality and worn.  Possibly some Carcharias sp.  Interesting find.