This is a fragment of the back and proper right arm of a figure with a small part of the back pillar. The stone is black granodiorite with small evenly distributed white and black biotite inclusions (may be diorite). GD3.
From Nubia (Sudan), Kerma, K X corridor 7-3. 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