Mother-of-pearl is the hard, silvery, internal layer of several kinds of shells, especially oysters, the large varieties of which in the Indian Seas secrete this coat of sufficient thickness to ...

Mother-of-pearl, the iridescent coating inside oyster shells, once formed the foundation of a thriving button industry in the U.S. What is now the United States became famous for two products.

A great irony of pearl history is that the least expensive cultured pearl product in the market today rivals the quality of the most expensive natural pearls ever found. The price-value anomaly is ...

More interesting, perhaps, is the biological process that occurs for the pearls to form. When debris gets trapped in between ...

A retractable foot, a siphon for sucking up water, powerful muscles, and, sometimes, a pearl. And you thought ... a kind of mollusk that's encased in a shell made of two valves, or hinging parts.

California-based Tsar Nicoulaioffers gold pearl trout roe for about $14 an ounce, with its bright orange in a firm shell and a silky, distinctive pop. AP California-based Tsar Nicoulai ...