Quartz on Kolwezite and McGuinnessite

A stunning piece I had to have analyzed, as it came to me as a Tsumeb piece but, to me, clearly was not. XRD analysis (included) determined it to be quartz over Kolwezite with McGuinnessite (an end member of the rosasite group), two quite rare minerals. They combine to form spherical deep blue masses with the quartz as a sparkling coating. Wow!

Locality: Mashamba West Mine, Kolwezi, DRC

Composition: Cu_1.34Co_0.66(CO₃)(OH)₂ and NiMg(CO3)(OH)2