Bowl of black stone (andesite porphyry) with large white inclusions, on small round base with sides flaring to wide uneven rim

Bibliography:  Nicholson, P., Shaw, I. (eds.). 2000. Ancient Egyptian Materials and Technology. Cambridge.

Notes:  The sources for porphyries used by the ancient Egyptians for vessels in the Predynastic and early dynastic periods are unknown (Nicholson and Shaw 2000: 48-49)