Works of "Research Collection"
Place Collected: Wassuli Range
Place Collected: Collahuasi Mine
Place Collected: Griqualand West
Place Collected: Sierra Gorda
Place Collected: Wheal Phoenix
Place Collected: Muzo Mine
Place Collected: Morefield Mine
Place Collected: Paradise Valley
Place Collected: Hope Valley District
Place Collected: Sandamap Mine
Place Collected: near Pringle, Black Hills
Place Collected: Postmasburg