Sphalerite      Iron Cap Mine, Landsman Camp, Aravaipa District, Graham County, Arizona.  Ex. Dr. Steve Chamberlain collection.  An interesting location goes with this attractive, slightly translucent, single crystal of sphalerite.  It measures 2.5 x 2.2 x 1.2 cm.  It has complex surfaces, as can be seen in the photos.  Base contact and minor edge contact.  No damage.  $60