- 1st Oxidation Zone
- 2nd Oxidation Zone
The best crystals, to 130 mm, were found in the second oxidation zone; a 90 mm crystal in the Harvard University collection (Harvard # 107992) is catalogued from 29 Level. However, large crystals were also found in the first oxidation zone as evidenced by specimens in the Karabacek collection at Harvard University, (ref. Harvard # 93920). Currier (2015) describes the purchase of three outstanding leadhillite specimens during a visit to Tsumeb in 1979; a photograph of one of these specimens, now in the MIM Museum, in Beirut, accompanies these notes.