closeup of sample of natural mineral from geological collection - unpolished Sphalerite (zink blende) rock on white marble background from Dalnegorsk, Primorye, Russia Poster #410522608
closeup of sample of natural mineral from geological collection - unpolished Sphalerite (zink blende) rock on white marble background from Dalnegorsk, Primorye, Russia Poster #410522608
