Briartite is an opaque iron-grey metallic sulfidemineral, Cu2(Zn,Fe)GeS4 with traces of Ga and Sn, found as inclusions in other germanium-gallium-bearing sulfides.
The primary mineralization is rich in germanium with renierite and briartite.
Finally, at the University of Louvain (U.C.L.), Jacques Thoreau (1886-1973) describes, in 1932, the saleeite of Shinkolobwe in Shaba, while his successor Jules Moreau acquires fame by his study on the copper-zinc-bearing deposit of Kipushi, which enables him to describe a new germanium mineral, briartite.
Two other holotypes, eylettersite and kivuite, are preserved in the private collection of the discoverer, while 14 other type species belong to collections of various institutions from abroad:
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