Sphalerite    Dal’negorsk, Kavalerovo Mining District, Primorskiy Kray, Far Eastern Region, Russia.  This is a very aesthetic grouping of twinned and non-twinned crystals that measures 3.8 x 3.3 x 2 cm.  The entire crystal grouping has a wonderful blue iridescence and is complete on all sides except a small area on back (this characteristic barely shows in any of the images).  No damage.  Minor white quartz in a couple places.  $50