Works of "Research Collection"
Place Collected: 4th & 5th level
Place Collected: South Crofty Mine
Place Collected: Conselheira Pena
Place Collected: Tanzania
Place Collected: Fowey Consols Mine
Place Collected: Kremnica
Place Collected: Alexander Co.
Place Collected: Adun Chilon range, Nertschinsk mining dist.
Place Collected: Derbyshire
Place Collected: Cromford
Place Collected: La Combe De La Sale
Place Collected: St. Andreasberg