A BIG, DOUBLY-TERMINATED Stak Nala tourmaline, very dark bottle-green, with a transparent top termination. This complete crystal is decorated with a blanket of tiny poker-chip calcites, and a doubly-terminated quartz crystal (multiply-terminated on one end) right at the top termination. There is a natural hollow tube running down through the crystal from the top termination. The bottom termination has a bit of contact in one place, but the fact that this termination is complete at all is really unusual.