Calcite      Dal'negorsk, Kavalerovo Mining District, Primorskiy Kray, Far-Eastern Region, Russia.  This is an impossibly complex, water clear, high luster calcite floater.  I see one small rub on one corner when using magnification, otherwise it is in outstanding condition.  6 x 5.1 x 4.2 cm.  The images do a poor job of showing the clarity of this specimen.  $45