Works of "Research Collection"
Place Collected: Sulfur Springs
Place Collected: Mt. Jackson Mine (Sonoma Quicksilver Mine)
Place Collected: New Almaden Mine
Place Collected: Altoona Mine
Place Collected: Skaggs Springs
Place Collected: Open Pit near Petaluma
Place Collected: Snowshoe Mine
Place Collected: New Idria Mine
Place Collected: Chilena Mine
Place Collected: Chilena Mine
Place Collected: Chilena Mine