Dims: 1.5 x 1.3 x 0.6" (3.8 x 3.3 x 1.5 cm)
Wt: 25.7 g
Sandamap Mine, Usakos, Namibia
This specimen appears to consist of a chunk of nearly amorphous Purpurite that is mostly covered by a thin crust of a dark brown rock. A few "breakage surfaces" expose the manganese phosphate mineral, showing its reddish-violet coloration and its characteristic silky luster. Like most examples of Purpurite, this material is slightly powdery and will rub off onto surfaces when lightly abraded. I cannot tell how much of the piece actually consists of Purpurite, but I think that it makes up at least one-third of its mass.