Abstract: ambia is one of the world's most significant sources of fine-quality emerald and has been called the second most important producer by value after Colombia (see, e.g., Suwa, 1994;Giuliani et al., 1998).For years, the mines in the Kafubu area (near the Kafubu River in the Ndola Rural Restricted Area) have produced emeralds of uniform color and size, which supported the cutting of vast quantities of calibrated goods.In addition, relatively large, fine stones are occasionally found (see, e.g., figure 1).Several articles have been published on