4701 Calcite, Mottramite, Sphalerite, Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia October 5, 2019 Steve Africa Namibia Old label “SW-Afrika”., Helmut Braith Click for full sized image…
North and Central Americas Ohio United States ncat Fluorite, Calcite, Marblehead Quarry, Marblehead, Ohio September 23, 2019
