This Eye of Horus (wedjat) amulet has a design on one side only and is pierced. The surface is darkened and is now brownish-black.
From Giza, Debris between mastabas G 7148 and G 7158. 1927: Excavated by the Harvard University–Museum of Fine Arts Expedition; assigned to the MFA by the government of Egypt.
Harvard University—Boston Museum of Fine Arts Expedition