Rare. Sparse, but widespread, mainly as microscopic inclusions in Ge- and Ga-enriched sulphide ores.
Paragenetic and General Notes
The first mineral described with essential gallium. According to some sources (e.g. www.mindat.org) Tsumeb shares type locality status with Kipushi, in the D.R.Congo; however, the IMA listing credits only Kipushi in this regard.
Gallite occurs most commonly as microscopic lamellae in sphalerite that is associated with germanite (Ramdohr, 1980). Also as grey metallic grains in the germanite itself (Keller, 1977). Note that these textures are only visible in polished section, by means of reflected light microscopy.