5533 Robertsite, Montgomeryite, Tip Top Mine (Tip Top pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USA October 5, 2019 Steve North and Central Americas South Dakota United States Type Locality for robertsite. Ex John Lewis collection.
North and Central Americas South Dakota United States ncat JP2341, Robertsite, White Elephant Mine, Cicero Peak, Pringle, Custer District, Custer Co., South Dakota, USA September 23, 2019
Europe Spain 2051 Montgomeryite, Crandallite, Montcada, Barcelona, Catalonia, Spain September 22, 2019
Australasia Australia Western Australia 9137 JP2703 Hydroxylapatite, Montgomeryite, Milgun Variscite Mine (Mount Deverell), Milgun Station, Meekatharra Shire, Western Australia September 23, 2019
Australasia Australia Victoria 0926 Parwanite, Taranakite, Montgomeryite, Parwan Cave, near Bacchus Marsh, Victoria September 20, 2019
