But Jack’s reflections, and the Caballero’s denials, were interrupted by a sharp noise. The raïs had taken a coin from his belt-pouch and tossed it onto one of the bars. It spun and buzzed, a disk of silvery white on a slab of yellow. "That is a piece of eight—if you have forgotten the color of silver," said Nasr al-Ghuráb. "What it lies on is gold."