Composition: CaZn(AsO4)(OH)
Crystal System : Orthorhombic
Colours: Colourless, pale-green, pale-blue, yellow-green, dark-green
Lustre : Sub-adamantine, sub-vitreous, greasy, silky
Hardness (H) : 4.0-4.5
Specific Gravity (S.G) : 4.13


Rare. Second oxidation zone (Gebhard, 1999).


  • Supergene
  • 2nd Oxidation Zone

Paragenetic and General Notes

Austinite occurs as yellow-brown crystals to 3 mm on corroded tennantite (Gebhard, 1999).

Cuprian austinite occurs as green to dark-green crystals and may form spheroidal groups or curved crystals (Pinch and Wilson, 1977).

Austinite has been reported to form pseudomorphs after tennantite (rare; Gebhard, 1999).