Jewelers and their clients have prized pearls since at least the days of Cleopatra. The Roman emperor Julius Caesar is thought to have invaded England in order to sate his desire for the freshwater pearls that were harvested in the rivers of Ireland, Scotland, and Wales. The charms of freshwater notwithstanding, salt-water pearls are the most sought-after variety. They are more lustrous and uniform in shape than their freshwater cousins....Continue Reading