This is an Eye of Horus (wedjat) amulet. It is bored from side to side. The eyebrow and pupil are colored black on one side.
From Giza, Cemetery G 7000 SW, pit VIII (G 7000 SW 8). 1925: excavated by the Harvard University–Museum of Fine Arts Expedition; assigned to the MFA in the division of finds by the government of Egypt.
Harvard University—Boston Museum of Fine Arts Expedition