"Sphere"

Rattleston, flintstone with a stoned plinthosella squomosa into its centre, rattles when being shaked.
I bought the marble at the mineral exhibition in St. Pölten, Austria, 2006.
Width: 2,3 in., Deepness: 2,3 in., Height: 2,3 in.
Dai made of walnut, natural, varnished.