Dims: 3.87x3.06x1.66" (9.83x7.78x4.22cm)
Wt: 12.20oz (346g)
Kalukaluku Mine, Katanga Proirng, Congo
This specimen has several dense sheets of malachite crystals that originally lined a cavity in the host talc, most of which has been removed. The edges show the radial growth pattern of intergrown malachite and brochantite crystals. Between the sheets are protected areas now exposing mossy sprays and a velvety carpet of malachite with a bright green appearance from some angles and a dark, even black appearance from others, due to the motramite needles which extend slightly beyond the malachite. The front "sheet" of malachite shows a silky luster, nearly a chatoyancy, due to the fine needles of which it is composed.