Greenockite, (w. Smithsonite)


Composition: CdS
Crystal System : Hexagonal
Lustre : Adamantine, resinous
Hardness : 3.0-3.5
Specific Gravity : 4.8-4.9
References: Strunz et al. (1958a)


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

Notable Finds

As prismatic crystals to 1 mm on wurtzite from the first oxidation zone. As tiny ochre-coloured crystals on smithsonite in the second oxidation zone (Gebhard, 1999). As part of the type assemblage for sidpietersite in the third oxidation zone.