8028 Boltwoodite, Calcite, Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia October 5, 2019 Steve Africa Namibia ex Bernie and Margaret Day Collection
Arizona North and Central Americas United States ncat JP1586, Calcite, Phelps Dodge Corporation Well No. 1, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA September 23, 2019
Australasia Australia New South Wales 0199 Stibnite, Calcite, Freehold Antimony Mine, Hillgrove, New South Wales September 18, 2019
