Clinochlore (variety Chroian Clinochlore)  previously known as Kaemmererite    Kop Krom Mine, Kop Dagiari, Erzurum Province, Turkey.  This is a stunning example of this deep purple material in well formed, large crystals.  The piece measures 3.6 x 2.7 x 2.2 cm.  Several transparent crystals are larger (to .7 cm).  $275