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 0137 Goethite, Calcite, Lake Cooper Quarry, Corop, Victoria September 18, 2019
Australasia Australia Victoria ncat JP420 Calcite, Gonnardite/Natrolite, Old Melbourne Quarries, Victoria September 23, 2019
Europe Sweden ncat JP2087 Stellerite, Calcite, Malmberget, Gallivare, Lappland, Sweden October 11, 2019