Natural freshwater pearls occur in mussels for the same reason ... Except for the old Arabic practice of sun-bleaching in the Persian Gulf, naturals were practically never processed.

Due to the increasing pollution in the world’s oceans, natural pearls are becoming extremely elusive—even still, according to Sotheby’s, the majority of natural saltwater pearls were ...

In the early twentieth century, a perfect pearl was considered the most valuable object in the world. The discovery of one in the Persian Gulf was a major event. It would even throw the global ...