This unique Okenite specimen sits at the back end of a basaltic lava tube. The central Okenite specimen measures approximately 4.5cm in diameter. The tube is lined with small Quartz and Amethyst crystals that are in turn covered with small clusters of Okenite. Looking down the tube at the large Okenite is amazing. Size cm (HxWxD): 8.5x9x9.5