Apophyllite    Cornwall Iron Mines, Cornwall Co., PA.  Ex. Dr. Steve Chamberlain Collection.  Circ. 1978.  3.5 cm football shaped cluster composed of radiating crystals to 1.7 cm on edge.  This is one of the best thumbnail specimen of these that I have seen..  this one only has a very tiny matrix contact under the collection number and has zero damage.  Another great east coast classic!  60$