Phenakite – Phenakite Roller, Leckbachrinne, Habachtal, Austria
 Former collection of Dr. Günter Grundmann
 At 5 cm long, this is a particularly large specimen of this rare mineral. The crystal displays all six prism faces and is partially water-clear.
 A rare, exceptionally large collector's item from the Habach Valley collection of Dr. Günter Grundmann. Dr. Grundmann authored the first ExtraLapis book on the emeralds of the Habach Valley in the early 1990s.