5316 Montgomeryite, Red House Barite Mine, Humboldt Co., Nevada September 29, 2019 Steve Nevada North and Central Americas United States
Australasia Australia Victoria 0925 Parwanite, Taranakite, Montgomeryite, Parwan Cave, near Bacchus Marsh, Victoria September 20, 2019
North and Central Americas South Dakota United States 5533 Robertsite, Montgomeryite, Tip Top Mine (Tip Top pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USA October 5, 2019
Europe Spain 1690 Montgomeryite, Santa Maria de Montcada, Barcelona, Catalonia, Spain September 22, 2019
