Macphersonite


Composition: Pb4(SO4)(CO3)2(OH)2
Crystal System : Orthorhombic
Colours: White, pale-brown
Lustre : Adamantine, greasy
Hardness : 2.5-3.0
Specific Gravity : 6.50-6.55
References: Gebhard (1999)

Occurrence

  • Supergene
  • 2nd Oxidation Zone

Notable Finds

In the 1980s, three specimens of water-warn macphersonite were found "somewhere between 20 and 30 level" (Gebhard, 1999). They were initially mistaken for leadhillite. In 1995, a single well-crystallised specimen of "leadhillite" with kegelite was purchased by German collector Georg Gebhard; it turned out to be macphersonite. After the mine had closed, in 1996, a single specimen was sold as anglesite to American dealer Charlie Key, who believed it to be leadhillite. It later proved to be macphersonite (Gebhard, op.cit.).