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In page Sinai Peninsula:

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From the time of the First Dynasty or before, the Egyptians mined turquoise in Sinai at two locations, now called by their Egyptian Arabic names Wadi Maghareh and Serabit el-Khadim. The mines were worked intermittently and on a seasonal basis for thousands of years. Modern attempts to exploit the deposits have been unprofitable. These may be the first historically attested mines.[citation needed]