(Cu,Zn)11(Ge,As)2Fe4S16 is a rare copper zinc germanium bearing sulfide mineral. It occurs at the Kipushi Mine, Democratic Republic of the Congo; and Namibia, among other places.(from Wikipedia)The hardness is 4.5.
Here occur with Chalcopyrite,Tennantite and Sphalerite. Is opaque with metallic luster .
Weight: 3.42 ct.