This is a very impressive specimen of Ferberite from Bolivia. The piece features several superb, sharp, lustrous, aesthetic, jet-black crystals measuring up to 4.2 cm across forming a beautiful "flower"-like crystal group associated with a gem Quartz crystal and minor Arsenopyrite crystals. These Bolivian Ferberites are often underrated and stand up well against any other Ferberites from China or Panasqueira. This piece was from the famous find in 1999 at Tazna.