Flint arrowheads.

These were bought some years ago, the seller told me they were from Africa and were part of his large collection of flint tools.
The largest (triangular) is just over 1 1/2 inches long and the shortest (pear shaped) is just 1 1/4 inches long.
Beautifully made, must have taken ages to do!

I put these in "Tools" and "Arts and Crafts", as there is no "pre-historic" category! :-)