GIA is a trusted authority known for its rigorous, objective analysis of both natural and cultured pearls. Learn about how ...

For at least 164,000 years, oysters have been part of the human diet, but people have been finding pearls in oysters for much ...

VAIL ” When you think of pearls, “pistachio” and “eggplant” are words that usually don’t come to mind. But Tahitian pearls, formed in the black lipped oyster, are creating a whole new language of ...

Receive emails about upcoming NOVA programs and related content, as well as featured reporting about current events through a science lens. Natural freshwater pearls occur in mussels for the same ...

TimesMachine is an exclusive benefit for home delivery and digital subscribers. Full text is unavailable for this digitized archive article. Subscribers may view the full text of this article in its ...