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curiosity number 015 Diego Ferri Pearls     The "oyster" bivalve molluscs are known to all for the production of jewelry beads that were the first in history. Already in 1500 A.C. Egyptian women used the beads in necklaces and pendants and are mentioned in the Bible and in the Qur'an. It is only around 1920 that the Japanese industrial Mikimoto succeeded in obtaining artificially the formation of pearls in oysters of the genus Pinctada that began to be reared intensively.