Dims: 2.9x1.75x1.6" (7.4x4.4x4.1 cm)
Wt: 2.37 oz (67.1 g)
Kalukaluku Mine, Katanga Proirng, Congo
While there are thick areas contributing most of this specimen's weight, it's area is largely provided by an eggshell-like thickness of malachite upon which a moss-like layer and several interesting sprays of malacite crystals have grown. Close examination reveals that the darker areas are actually a black mineral which I believe to be mottramite. In many areas (even the leafy sprays of crystals), from some angles the appearance is black, yet from others it is a bright (almost glowing) green. Since the straight-on appearance is black, while the view from the side is green, it must be that the individual needles appear green from the side but black from the top. My loupe cannot resolve any detail in their form.