Do you know how a pearl comes to be?" "Oysters make them, from a bit of sand." "Aiyah. From a bit of sand." He rolled the pearl between his fingers. "All pearls begin as something unpleasant that the oysters cannot expel from themselves, even though they may want to. So they embrace these things that will not leave them, shaping them and smoothing away the sharp edges, until over time, they make of these unwanted things great treasures.