These are small, authentic fossil Mosasaur teeth from the Late Cretaceous (~70 Million Years) phosphate deposits near Khourigba, Morocco. Small Mosasaur teeth are quite common in these deposits and are collected by locals as a byproduct of the massive phosphate mining operations in the area.
There are teeth from several different species of Mosasaurs and they are between 3/4" and 1 1/4" long with most being in the middle of that size range. Some may have small defects such as chipped tips.
Mosasaurs are a family of enormous marine reptiles that truly dominated the seas 90 million years ago. They ruled during the last 20-25 million years of the Cretaceous period. With the extinction of the ichthyosaurs and decline of plesiosaurs, mosasaurs diversified to become prolific apex predators in nearly every habitat of the oceanic world.