This is a very light buff-colored hemispherical cup/bowl with two prominent rilling lines visible on the exterior.
From Dakka (ASN 101/124 ). 1910. Excavated by Harvard University–Boston Museum of Fine Arts Expedition for the Archaeological Survey of Nubia; assigned to the MFA in the division of finds by the Egyptian government. (Accession Date: July 6, 2006)
Archaeological Survey of Nubia