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.
Australasia Australia Western Australia 9092 JP2758 Montgomeryite, Hydroxylapatite, Crandallite, Milgun Variscite Mine (Mount Deverell), Milgun Station, Meekatharra Shire, Western Australia September 23, 2019
Europe Spain 1690 Montgomeryite, Santa Maria de Montcada, Barcelona, Catalonia, Spain September 22, 2019
North and Central Americas South Dakota United States ncat JP345 Montgomeryite, Whitlockite, Fluorapatite, Tip Top Mine (Tip Top pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USA January 27, 2023
Nevada North and Central Americas United States 5316 Montgomeryite, Red House Barite Mine, Humboldt Co., Nevada September 29, 2019