20051 Dioptase, Calcite, Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia April 25, 2020 Steve Africa Namibia Sharp green dioptase crystals on calcite. Ex Roger Colling Collection. Video best viewed full screen.
Australasia Australia Victoria 0894 Calcite, ‘Pyrolusite’, David Mitchell Quarry, Lilydale, Victoria September 20, 2019
Connecticut North and Central Americas United States 2237 Calcite, Chlorite Group, O & G Southbury Quarry (Silliman Quarry), Southbury, New Haven Co., Connecticut, USA April 4, 2022