This is a rectilinear fragment with 2 worked surfaces forming a corner. The stone is black granodiorite with many small pink inclusions and small mica inclusions. GD6.
From Nubia (Sudan), Kerma, K III 6(1). 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