One fragment with a finished surface with a small ridge. Possibly edge long feather. See Documentation for other bird related fragments of black granite.
From Nubia (Sudan) Gebel Barkal, Rm 907. 1916: excavated by the Harvard University-Museum of Fine Arts Expedition; assigned to the MFA by the government of Sudan.
Harvard University—Boston Museum of Fine Arts Expedition
Egyptian, New Kingdom, Dynasty 18, reign of Amenhotep III (?), 1390–1352 B.C. (?)