Description
From the type locality, the Vispi Quarry of San Venanzo, this exceedingly rare hydrated, potassium, calcium, alumino silicate is a member of the zeolite group of minerals. Emplaced in a boxwork matrix are spherical aggregates of lustrous and translucent, white to cream coloured Willhendersonite crystals - but they are micros, and you won´t see them in this photo. Anyway a great piece of a rare species.