Composition: Zn2(AsO4)(OH)
Crystal System : Orthorhombic
Colours: Colourless, white, pale-yellow, yellow, green, plum
Lustre : Vitreous. Sub-vitreous, waxy, greasy
Hardness : 3.5
Specific Gravity : 4.32-4.48

Bartelke (1976)


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

Notable Finds

The occurrence of cobaltian adamite in the first oxidation zone is notable (see Karabacek collection # 4318, Harvard University # 93828). In the third oxidation zone, very unusual white, needle-like crystals of adamite occurred with leiteite and legrandite in the "Zinc Pocket", on 44 Level. (See also the notes on zincolivenite, and olivenite.)