Dims: 2.4 x 2.3 x 2.1" (6.1 x 5.8 x 5.3 cm)
Wt: 1 lb., 3.0 oz. (538 g)
Bou Azzer, Morocco
This heavy specimen consists of a large chunk of crystalline Skutterudite. Much of its surface is rough and uneven due to breakage, but a substantial portion is intact, showing the faces of many intergrown crystals. These crystals are not complete due to the fact that they formed right from the base, but many are at least 50% complete. The largest of these measure at least 0.4" (1.0 cm) in diamter, and all have excellent cubic form. They occur as cubes whose corners are truncated by such large faces that they are nearly cubo-octahedral. All have the bright, silvery-white color and very bright metallic luster that are standard for this mineral. A few bits of shapeless white calcite rest in crevices between crystals, and a black material coats a small portion of the surface- I am not sure, but I almost think that this black material is sphalerite.