A black ceramic disk object, thin walled, and likely formed from a LB sherd. Straight line impressions visible on the interior surface, exterior surface is almost completely abraded away. The black shade is nearly identical on both surfaces--the interior and the abraded. Light brown corrosion covers 30% of all surfaces. The broken edges of the disk are rough and in consistent; the diameter is highly variable. Chemically cleaned on 2008-12-01.