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:Monthly Mineral Chronicles Volume 3 Issue 7...Corona Virus Impacting...A Nice Little Find...Mineral of the Week - Opal...Monthly Mineral Chronicles... Critter Cam - Bin Spider! Ulrichite, Lake Boga