This week’s Mineral of the Week (MotW) is dioptase! 20051 Dioptase, Calcite, Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia Subscribe to Dad Dad Diary. Related posts:Corona Virus Impacting...A Tad Expensive...Calm Before the Storm...Unboxing...Collected Back In The Day... Critter Cam - Bin Spider! Ulrichite, Lake Boga