Dims: 2.0" x 1.5" x 1.4" (5.1 x 3.8 x 3.6 cm)
Wt: 3.64 oz. (103.1 g)
Kuse Mine, near Bau, Sarawak, Borneo
I do believe that this is the first specimen of any mineral that we have ever had from Borneo! The Arsenic is in the form of a brownish-colored patch with a dull, metallic luster that rests on the gray host rock. Close examination will reveal that this small, brownish patch is actually a thin section of a crust that has botryoidal form. Further examination will reveal that the gray host rock is partly permeated with small, round nodules of the element that show a dull-gray to black coloration and a dull metallic to a dull matte luster. Also present in the host rock are many needle-like stibnite crystals. These are easy to spot, as they have a moderate gray coloration and a metallic luster that is much brighter than any of the other constituents of this specimen.