Far south-west of the main continent exists an island in a shape of crescent moon with dense jungles and slender mountain peaks and a single city named Kalt stands in a place where the islands' central lake opens to the sea. (large lagoon with a big river flowing into the sea) This city does not have any slaves, yet it is rich.
The inhabitants mine metals from the lake, where a big volcano once stood. And its beaches are full of pearls. The sand glitters with the iridescent dust from the shells and pearls ground by the sea waves.
Could there really be a beach like that?
Could the iridescent dust last for a long time or would it decompose?
If most of the pearls were collected by the inhabitants, would more wash up to the beach, if there are lots of clams living around the island?