Willhendersonite
Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy
6.3 x 3.0 x 2.2 cm. From the type locality, the Vispi quarry, this exceedingly rare hydrated, potassium, calcium, alumino silicate is a member of the zeolite group of minerals. Emplaced in a box-work matrix are spherical aggregates of lustrous and translucent, white to cream colored willhendersonite crystals - but they are micros. Ex Renato Pagano ...
© Rob Lavinsky & irocks.com