Cerussite

Cerussite


Composition: PbCO3
Crystal System : Orthorhombic
Lustre : Adamantine, Vitreous, Resinous, Pearly, Dull, Earthy
Hardness : 3.0-3.5
Specific Gravity : 6.53-6.57
References: Gebhard (1999)

Occurrence

  • Supergene
  • 1st Oxidation Zone
  • 2nd Oxidation Zone
  • 3rd Oxidation Zone

Notable Finds

In the first oxidation zone cerussite was found to a depth of c.400m but not beyond (Gebhard, 1999), with the best crystals found between 150m and 250m below surface (Von Bezing, 2014). In the 1970s, fine cerussite crystals were found in abundance in the second oxidation zone and, notably, very fine reticulated groups were recovered from the manto ore bodies (Clive King, private communication to M. Southwood, 2013). In the third oxidation zone, the so-called "Lead Pocket" was found on 43 Level and was noted, inter alia, for hydrocerussite replacing cerussite crystals to varying degrees. Fine examples of red cerussite (coloured by inclusions of cuprite) were also recovered (separately) from these deepest workings (Gebhard, op. cit.).