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What "NOVA" 10-th episode about
The pearl-the only gem produced by a living animal-has long carried a certain allure. Yet the best mollusk for making this gem-the pearl oyster-doesn't always produce a pearl, and even then, the pearls are rarely perfectly round. It wasn't until the late nineteenth century, when a Japanese scientist discovered a technique to incite oysters to produce these gems, that an industry was formed.
Episode number: 10
Episode name: "The Perfect Pearl"
Episode release date: 30 december 1998 at 02:00
Status: aired