Dims: 3.9 x 2.9 x 0.9" (9.9 x 7.4 x 2.3 cm)
Wt: 5.45 oz. (154.8 g)
Likasi, Shaba Province, Zaire
Several dozen very small Cornetite blades rest flat against the gray shale base of this specimen. These crystals appear to be in very good condition- only those at the edges of the base rock are visibly damaged or incomplete. None of these exceed 0.2" (5 mm) in length or width, and measure only 1 or 2 mm in thickness. Their orthorhombic bladed form appears to be good, though most are somewhat warped due to flattening and intergrowth. There are a few well-defined edges visible, however. All have a deep blue coloration with a hint of green and a pearly-to-matte luster, and are likely translucent, though this is difficult to determine. An extremely thin layer of another copper-based mineral separates most of the Cornetites from the shale base- I cannot identify this other mineral.