This amulet is made of faience, and its is glaze completely gone. There is a loop on top and details incised on both sides. The amulet represents the djed-pillar. The pillar, which symbolized the spinal column of the funerary god Osiris, was the hieroglyphic symbol for stability.
From Nuri, Pyramid XLII. January 1918: 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