We do not see a lot of copper, from the Tsumeb mine, all things considered. This particular specimen features an interlinked chain of elongated copper crystals growing attractively on contrasting matrix, where the copper has been replaced by cuprite. It is dramatic and very interesting, and I have not seen another specimen of this replacement from Tsumeb in such size and richness (only as small, isolated replacements). ex Marshall Sussman Tsumeb collection.