Final answer:
The head of Iyoba (Queen Mother) is made of cast bronze and features a woven cap patterned after coral beads.
Step-by-step explanation:
The head of Iyoba (Queen Mother) was made of cast bronze. The bronze head portrayed an idealized likeness of the Queen Mother, usually resembling the Oba when he was young. It features a woven cap patterned after coral beads, with a single bead hanging down on the forehead as a tribute to the artist. The head would be placed on an altar made to honor the king.