Iowaite


Composition: Mg6Fe3+2(OH)16Cl2.4H2O
Crystal System : Trigonal
Colours: Yellow, dark green-blue
Lustre : Greasy
Hardness (H) : 1.5
Specific Gravity (S.G) : 2.09
References: Gebhard (1999)

Distribution

Extremely rare. Questionable status at Tsumeb. Possibly (?) second oxidation zone.

Occurrence

  • Supergene
  • 2nd Oxidation Zone

Paragenetic and General Notes

Gebhard (1999) reports that sub-mm, blue, hexagonal plates of iowaite were observed on enargite by Italian collector, Renato Pagani. This needs confirmation, as the paragenesis seems highly unlikely.