This exquisitely complex and intergrown bournonite miniature features attractive, sharp, lustrous, complex groupings of tabular, brilliant metallic cogwheel crystals in parallel growth. All are twinned! The cluster sits upright for display very nicely to highlight the sharp and reflective bournonite crystals. Ex. Paul Zerfass collection with label. This is a highly unusual, and aesthetic miniature specimen from classic older finds in the early 2000's.