Works of "Research Collection"
Place Collected: Spruce Pine
Place Collected: New Cornelia Mine (Ajo Mine)
Place Collected: New Cornelia Mine (Ajo Mine)
Place Collected: New Cornelia Mine (Ajo Mine)
Place Collected: near Little Switzerland
Place Collected: Comet Lake
Place Collected: Quadville
Place Collected: Cube Mine
Place Collected: New Cornelia Mine (Ajo Mine)
Place Collected: near Celo
Place Collected: near Celo