2195 Holtite, Polylithionite, Mt Plosjaja, Keivy, Kola Peninsula, Russia September 22, 2019 Steve Europe Russia ex Fersman Mineralogical Museum, Moscow.
Canada North and Central Americas ncat JP1644 Polylithionite, Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carriere Mont Saint-Hilaire; MSH), Mont Saint-Hilaire, La Vallee-du-Richelieu RCM, Monteregie, Quebec, Canada October 11, 2019
Canada North and Central Americas 7147 Polylithionite, Serandite, Mont Saint-Hilaire, La Vallee-du-Richelieu RCM, Monteregie, Quebec, Canada October 5, 2019
Canada North and Central Americas 1766 Polylithionite, Rhodochrosite, Poudrette Quarry, Mont St Hilaire, Quebec, Montreal, Canada September 22, 2019
