Authors:

At root, a pearl is a 'disturbance' a beauty caused by something that isn't supposed to be there, about which something needs to be done. It is the interruption of equilibrium that creates beauty. Beauty is a response to provocation, to intrusion. ... The pearl's beauty is made as a result of insult.

Julia Cameron (2005). “The Sound of Paper”, p.14, Penguin
At root, a pearl is a 'disturbance' a beauty caused by something that isn't supposed to be there, about which something needs to be done. It is the interruption of equilibrium that creates beauty. Beauty is a response