Extremely rare (?) The level in the mine from which the type material was recovered is not recorded.
Paragenetic and General Notes
Discovered on specimens purchased in Namibia (by Gerd Tremmel) in the late 1970s. Isostructural with gartrellite, but chemically it is closely related to helmutwinklerite.
Zincgartrellite occurs on chalcocite, with wulfenite and duftite. It forms aggregates to 0.5 mm, comprising tiny tabular yellow-green crystals of <0.1 mm.
Also as encrustations of minute, bright-yellow, tabular crystals (<0.1 mm), associated with zincolivenite and quartz, on silicified, mineralised dolostone.
As with most species in the Tsumcorite Group, analytical verification is necessary for the identification of zincgartrellite.