Dims: 1.8 x 1.3 x 1.0" (4.6 x 3.3 x 2.5 cm)
Wt: 22.7 g
#2 open pit, Broken Hill Mine, Kabwe, Zambia
Scores of tiny Hopeite crystals rest on the dull brown host rock of this thumbnail specimen. These crystals do not exceed 0.1" (3 mm) in any dimension, and are in fair condition- most are heavily weathered. This also affects their orthorhombic prismatic form, as the weathered crystals appear to be very warped and incomplete. Only a few show very good form, with well-defined edges and clean faces that possess a bright pearly-to-vitreous luster. All have a rusty-brown coloration that may be due to iron absorbed from the host rock. The better-formed crystals are dimly translucent, but those that are weathered are opaque. There are thin crusts of material between the Hopeite clusters and the base rock- I do not know what they are made of, but some of them have a reniform habit.