Lots of people have made axes over the years, too many to name here,
http://en.wikipedia.org/wiki/Hand_axe
The large ones are made of the giant clam, Tridacna gigas, a Pacific species, which is becoming rare. Indeed clams of adequate size have been so rare for so long that some peoples in the Pacific, on...
Copper
Les Paul, George Beauchamp and Rickenbacker