Tsumeb is the Type Locality
Common. Occurs in all three oxidation zones.
- 1st Oxidation Zone
- 2nd Oxidation Zone
- 3rd Oxidation Zone
Paragenetic and General Notes
Duftite (Tsumeb type locality) occurs as olive to grey-green and dark-green crusts, sometimes sub-botryoidal. Also as distinct green crystals exceptionally to 3 mm (Pinch and Wilson, 1977). Duftite is readily confused with conichalcite or mottramite.
Modern studies (Kharisun et al., 1998; Jambor et al., 1980) have shown that the "β-duftite" of Guillemin (1956) is not a distinct polymorph but a Ca-rich duftite, intermediate in a continuous solid solution series between duftite and conichalcite. Duftite from the upper portion of the first oxidation zone is usually lead-dominant (the former duftite-α), while second oxidation zone duftite is usually calcium-bearing (the former duftite-β; Von Bezing et al., 2014.)
Duftite is reported to form pseudomorphs after the following minerals: azurite (rare); dolomite (rare); enargite (rare); mimetite(rare); tennantite (rare).