Dims: 2.0 x 1.7 x 0.9" (5.1 x 4.3 x 2.3 cm)
Wt: 1.91 oz. (54.4 g)
Mupine, Shaba Province, Zaire
A crust made up of hundreds of tiny, intergrown Sphaerocobaltite crystals coats the gray host rock of this thumbnail specimen. Though the crust shows some evidence of damage, most of it is in very good condition. Only a few faces of each crystal are visible, giving off a pearly-to-vitreous luster, but one can still discern their almost tabular, trigonal form. The crust has a deep pink coloration with a slight hint of violet, and is translucent, though the host rock prevents the transmission of most light. The host rock itself appears to be made of rust-stained chert or flint, but concentrated hydrochloric acid does cause slight effervescence.