Works of "Research Collection"
Place Collected: Phoenix Mine
Place Collected: 23rd level; Lake Superior
Place Collected: South Kearsarge Mine
Place Collected: Arbersberg
Place Collected: Beckwourth Pass
Place Collected: St. Andreasberg
Place Collected: Washington Mine
Place Collected: Litomerice
Place Collected: Litomerice
Place Collected: Lake Superior