Co. Durham England United Kingdom 10022 Calcite, Boltsburn Mine, Rookhope District, Weardale, North Pennines, Co. Durham, England October 5, 2019
Indiana North and Central Americas United States 4076 Smythite, State Route 37 road cut (6), Bloomington, Monroe Co., Indiana, USA March 23, 2018
Cumbria England United Kingdom 1307 Calcite, Winscales Mine, Egremont, Cumbria, England September 22, 2019
