Works of "Research Collection"
Place Collected: Wausau Complex
Place Collected: Wilagedera
Place Collected: Namherere Mine
Place Collected: San Valentin Open Pit
Place Collected: Cuyuna Dist.
Place Collected: Bluebell Mine
Place Collected: Schefferville
Place Collected: Ardua Lake
Place Collected: Schefferville
Place Collected: Schefferville
Place Collected: Minnesota
Place Collected: Schefferville