Found at el-Kab in Egypt (also known as Kamena). Similar diorite bowls were found at Knossos.
Bibliography
Evans, Arthur. 1935. The Palace of Minos at Knossos, II, p. 58, fig. 27a
Myres, John (ed.). 1936. British Archaeological Discoveries in Greece and Crete 1886-1936, p. 13