Democratic Republic of the CongoShattuckite is a rare copper silicate mineral, which like a number of other secondary copper minerals has a very attractive blue color. It is named after its type locality, The Shattuck Mine, where it was first discovered in the copper mines of Bisbee, Arizona. At the Shattuck Mine, it forms pseudomorphs after malachite, i.e. it replaces the crystal structure of the original malachite atom by atom. Shattukite takes a very good polish and is particularly excellent when used for carving—it is rarely seen in slab form as it appears in this handsome box. The slabs are beautifully book-matched along the sides. The hinged lid opens to reveal a wood lined interior, numbered 0678 and signed Konstantin Libman. Measuring 8 1/2 x 6 x 2 in