Hydroxylapatite


Composition: Ca5(PO4)3OH
Crystal System : Hexagonal
Lustre : Sub-vitreous, resinous, waxy, earthy
Hardness (H) : 5
Specific Gravity (S.G) : 3.10-3.21

Distribution

Extremely rare. Second oxidation zone.

Occurrence

  • Supergene
  • 2nd Oxidation Zone

Paragenetic and General Notes

Reported as a component of the type assemblage for hermannroseite, from 28 Level, in association with conichalcite, pseudomalachite and whitlockite (Von Bezing et al., 2014). in this occurrence, the hydroxylapatite is coloured black by manganese oxides.