Colorado North and Central Americas United States ncat RAM4 CW11 Nontronite, Celadonite, Wolf Creek Pass, Archuleta County, Colorado, USA October 2, 2024
Australasia New Zealand ncat JR10 Phillipsite-K, Erionite-K, Nontronite, Moeraki Point, Otago Region, New Zealand March 10, 2024
Australasia Australia Tasmania 1443 Nontronite, Siderite, Boral Quarry, Bridgewater, Tasmania September 22, 2019