Pōhaku (stone)

Summary: 
Oval, egg-shaped, grey stone.
Description: 

Stone Sphere. Long Circumference: 10 inches, Short Circumference: 8 3/8 inches, Color: Light Brown, Features: Very smooth egg shape, Weight: 1 lb. 4.2 oz. Item could be a game ball or even might have been used as a muller or pestle but might only be a pseudoartifact.