Natrolite on Phonolite (Trimingham Coll., rare locale)

Item Description

Diverging clusters of lustrous, translucent, tan natrolite prisms fill a sculptural vug in phonolite matrix on this showy, rich and highly representative example from this well-known active quarry in the Erzgebirge. Phonolite is a rare extrusive volcanic rock. Ex Bob Trimingham Collection.