This is a fragment with one rounded worked surface. The stone is dark gray granite with many small pink feldspar inclusions and mica inclusions.
From Nubia (Sudan), Kerma, K III 2(1)a. 1914: Excavated by the Harvard University–Boston Museum of Fine Arts Expedition; assigned to the MFA in the division of finds by the government of Sudan.
Harvard University—Boston Museum of Fine Arts Expedition