A very good and colourful Tsumeb specimen with numerous Dioptase crystals up to 4 mm on Calcite. The Dioptase here is superbly formed and rich of faces as usual. They are super sharp and highly lustrous with this typical, deep emerald green colour. The crystals are accented by a fine pattern along some faces what gives them a slightly frosted look. Only minor imperfection at the periphery but a great and super aesthetic mini in splendend condition.