Works of "Research Collection"
Place Collected: Naica Mine
Place Collected: southwest of Urania Peak in Cactus Range
Place Collected: Serra Dos Almas
Place Collected: Murra el Elevan Cave
Place Collected: 20 mi. N of Plush, Oregon
Place Collected: Murfreesboro
Place Collected: Owyhee Dam
Place Collected: Wagholi Quarry
Place Collected: Outokumpu Mine
Place Collected: Volonandrogo
Place Collected: Tsilaizina