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Africa Namibia 0877 Dioptase, Wulfenite, Minrecordite, Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia March 21, 2018
Arizona North and Central Americas United States 6088 Dioptase, Harquahala Mine, Harquahala Mountains, La Paz Co., Arizona, USA October 2, 2019