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 7147 Polylithionite, Serandite, Mont Saint-Hilaire, La Vallee-du-Richelieu RCM, Monteregie, Quebec, Canada October 5, 2019
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 1766 Polylithionite, Rhodochrosite, Poudrette Quarry, Mont St Hilaire, Quebec, Montreal, Canada September 22, 2019
