30061 Groutite, Calcite, Wessels Mine, Hotazel, Kalahari manganese field, Northern Cape, South Africa April 21, 2020 Steve Africa South Africa Black groutite on an unknown brown stalactitic mineral with calcite that fluoresces red. Ex Barry Johnson Collection.
Australasia Australia New South Wales 1460 Goethite on Calcite, Brown’s Creek, near Blayney, New South Wales November 27, 2021
Co. Durham England United Kingdom 6085 Barite, Calcite, Fluorite, Dam Rigg Level, Northside Mines, Whaw, Arkengarthdale, North Pennines, North Yorkshire, England October 2, 2019