Strontianite on Celestine and Calcite     Meckley Quarry, Northumberland, County, PA.  Ex. Dr. Steve Chamberlain collection.  This is an interesting aggregate composed of gemmy blue celestines and small calcites with areas of strontianite over coatings.  The specimen measures 5.5 x 3.5 x 3.2 cm and has no damage.  $95