Carsten Slotta, of Mineral Treasure has this specimen of fluorite currently listed on e-Rocks.
From the lesser known Black Forest locality of Igelschlatt Mine, Waldshut the piece is covered in amazingly perfect hexakis-octahedral crystals.
(It should be added that Igelschlatt Mine is well known for both icositetrahedral and hexakis-octahedral fluorite crystals - see the locality link below for more details/pictures.)
It is not often you see this habit in real life, and not often you see such text book examples of this crystalisation.
