This fragment has three smooth, rectilinear surfaces. It is possibly part of a back pillar. The stone is grayish gren greywacke.
From Nubia (Sudan), Kerma, K X grave K 1804 debris. 1914: Excavated by the Harvard University–Boston Museum of Fine Arts Expedition; assigned to the MFA by the government of Sudan.
Harvard University—Boston Museum of Fine Arts Expedition