Natrochalcite (rare sulfate) Marty Zinn Coll.

Item Description

Natrochalcite is an ultra-rare hydrated, sodium, copper sulfate. Clusters of gorgeous, gemmy, rich emerald-green crystals are scattered on three sides of the gossan matrix. Probably old-time material, but no proof. The specimen is either from the famous Chuquicamata Mine (Type Locality) or the Fortuna Mine. Ex Marty Zinn Collection.