The rim is inverted. The stone is fine-grained and soft. The surface is buff with blue-gray spots. There is no ring at the top. It is broken and mended. Fragments are missing.
From Giza, Menkaura (Mycerinus) Valley Temple. 1911: 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