Stronitianite    Winfield, PA.  Collected by Michael Walter, late 1990s.  This is the finest thumbnail sized piece of this material I have ever had available.  Large strontianite ball measures 2.5 x 2.2 x 1.7 cm on druse calcite.  Impeccable quality (white patch is natural).  3.9 x 2.2 x 2 cm overall.  Very impressive for one of these.     $112