Works of "Research Collection"
Place Collected: Nuristan
Place Collected: Karlovy Vary
Place Collected: San Miguel Di Piracicaba
Place Collected: Wah Wah Mtns.
Place Collected: Battle River
Place Collected: near Placerville
Place Collected: Cianciana
Place Collected: Dresser Minerals
Place Collected: Berezovskoe
Place Collected: Tom's Quarry