Famous for an astonishing number of new mineral species, Lengenbach quarry in Switzerland is the Type Locality to 51, but what is more remarkable is that only 186 minerals are reported from there, meaning that 24.7 percent of them were first discovered there. There can't be many world localities with best statistics than that! That also equates to more than half of all species first described from the country of Switzerland come from that one quarry. Seligmannite, a lead copper arsenic sulphide, is one of them, and was described in 1901. This old miniature specimen comes from the superb systematic collection assembled by the brothers Martin and Michael Günther (1951-2007 & 1956-2021) and features a glossy, dark grey to black crystal, 5 mm in length spanning a small cavity within the classic bright white fine-grained Dolomite 'marble' matrix. The crystal is intact, but has a couple of internal fractures. Its termination is not perfect, but appears to be a naturally rounded, smooth surface, rather than angular faces. Two thin, almost parallel bands, of finely crystallized golden Pyrite span the matrix either side of the main cavity. A fine example of this rare sulphosalt from its famous Type Locality. An old number label (L1214) is attached to the specimen and pre-dates the Gunther's collection.
