North and Central Americas South Dakota Type Locality United States 7372 JL3695 Tiptopite, Roscherite, Montgomeryite, Tip Top Mine (Tip Top pegmatite), Fourmile, Custer Mining District, Custer Co., South Dakota, USA December 28, 2020
Australasia Australia Victoria 0925 Parwanite, Taranakite, Montgomeryite, Parwan Cave, near Bacchus Marsh, Victoria September 20, 2019
Australasia Australia Victoria 0926 Parwanite, Taranakite, Montgomeryite, Parwan Cave, near Bacchus Marsh, Victoria September 20, 2019
Nevada North and Central Americas United States 5316 Montgomeryite, Red House Barite Mine, Humboldt Co., Nevada September 29, 2019
