A top drawer Tennantite specimen displaying large (4cm on edge), and sharply terminating tetrahedral crystals. Typically Tsumeb Tennantite crystals can appear quite corroded with a dull lustre but these are of the cleaner, brighter end of the scale. The crystals are also aesthetically positioned and are coupled with the attractive associate minerals of translucent, well crystallised Dolomite, and colourful Posnjakite and Langite. Only a few slight contacts but this doesn't detract in any way. Marvellous!