Michigan North and Central Americas United States ncat JP1679, Copper, Prehnite, Quincy Mine, Hancock, Houghton Co., Michigan, USA September 23, 2019
England United Kingdom 4411 Prehnite, Moorswood Quarry, Dysgwylfa Hill, Shropshire, England October 5, 2019
North and Central Americas Rhode Island United States 4003 Prehnite, Apophyllite, Hanville Quarry, Cumberland, Rhode Island, USA October 4, 2019
Europe Switzerland ncat JP0963 Laumontite, Prehnite, Gneiss quarries, Arvigo, Calanca, Calanca Valley, Moesa, Mesolcina Valley (Misox), Grischun (Grisons; Graubunden), Switzerland October 8, 2019
