Some historians believe Julius Caesar conquered Great Britain partly to have better access to locations where pearls were found. European explorers found Native Americans wearing pearls, too. These gems have been valued for thousands of years. Readers are introduced to how pearls are made, the difference between naturally formed pearls and cultured pearls, and even how to tell a fake pearl from a real one! Full-color images showcase the luster and beauty of pearls as the main content and interesting fact boxes highlight the geological, historical, and scientific studies of pearls.