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.
Nevada North and Central Americas United States 0213 Millerite, Calcite, Grays Quarry, Hamilton, Hancock Co., Illinois September 18, 2019
Europe Greece 9073 JP2628 Ecdemite, Calcite, Passa Limani Cove slag locality (Pacha Limani Cove slag locality), Passa Limani area, Lavrion District slag localities, Lavrion District (Laurion; Laurium), Attiki Prefecture (Attica; Attika), Greece October 11, 2019
Australasia Australia Victoria ncat JP3340 Magnetite, Calcite, Pseudobrookite, Mount Shadwell, Mortlake, Moyne Shire, Victoria September 23, 2019