Watch a video of this specimen by following the Vimeo link below: https://vimeo.com/940670166 Here is a superb miniature of prehnite from the Combe de la Selle in Oisans! It features a pristine focal 1.7 cm large 'helmet' of prehnite totally included with green actinolite and very unusual powdery chlorite balls. You can see other curved prehnite crystals, all of them nested on a bed of fibrous clear green actinolite. Notice also some small green epidote rods that emerge from the actinolite. A miniature of the finest quality from the most famous alpine locality for prehnite!