Here is one of the greatest rarities from the Tsumeb Mine: Helmutwinklerite. The specimen shows a well-formed pale greenish to pale bluish helmutwinklerite crystal aggregate one some tennantite matrix. Great rarity.

Helmutwinklerite is a type locality mineral in Tsumeb Mine and is only known from three localities worldwide, however, the best (but only few) pieces are known from Tsumeb Mine.  

Ex. Bolzenhard collection from the year 1981.

Important note: The specimens are from the renowned collection of Dr. Gerhard JUNG (Hagendorf specialist, after whom the mineral Jungite was named). Dr. Jung was very meticulous regarding the provenance of his pieces. The previous owner is often noted - it is noticeable that Dr. Jung apparently had good contacts with the famous Tsumeb collectors Walter Richard KAHN (Warikahnite) and Wolfgang BARTELKE (Bartelkeite) from the early 1970s to the late 1980s. Many of the pieces originally came from the hands of the aforementioned pioneers. The specimens of the JUNG collection with first-class and documented provenience are presented here.