The lab grown Chatham White Pearl shines with iridescence unlike other man made pearls. Pearls have been treasured throughout history. This organic gem, created when a mollusk covers a foreign object with layers of lustrous nacre, once happened only by chance. Today, man cultures pearls. Chatham Cultured Pearls are the product of more than a hundred years of refinement of the culturing process to create pearls of the highest quality.