Why have your pearls turned pink?

Pearls can turn pink due to several factors, including exposure to certain environmental conditions and changes in water chemistry, particularly in saltwater. Additionally, the presence of specific microorganisms or algae can affect the coloration of pearls. In some cases, the natural aging process or the type of oyster producing the pearls may also contribute to this color change. If the pearls have been treated or coated, that can also result in a shift in color.