Witherite     Mahoning # 1 Mine, Cave-In- Rock, Illinois.  Ex. Dr. Steve Chamberlain Collection.  A wonderful grouping of intergrown crystals in a radiating aggregate.  Highly fluorescent material.  The crystals white, very translucent and nicely formed.  Some areas are almost clear.  Back side shows a minor matrix contact, otherwise a floater, and minor ???? (white crystals probably calcites).  5.3 x 5 x 4.5 cm.  No damage.  Fine specimen.  250$