Although stated in several popular publications, there is no proof, 
            archaeological or in ancient texts, of emerald mining in the Eastern 
            Desert during the Pharaonic period. Ancient texts provide us with 
            only a few clues on later emerald mining in the Sikait region. According 
            to the writer Strabo (ca. 60 BC - 20 AD), emerald mining started in 
            the Ptolemaic period. Nearly a century later Plutarch described how 
            King Ptolemy XII, the father of Cleopatra (VII) gave the Roman general 
            Lucullus a gold fitted emerald. The portrait of Ptolemy was engraved 
            in the gemstone, which made it impossible for the general to refuse 
            this gift without offending the king.
            The first unequivocal mention of the Sikait region appears on stelae 
            of the early Roman period. An inscription from the quarry at Wadi 
            Umm Wikala dated 11 AD mentions the mines, as does a text carved on 
            the Serapis temple in Berenike, which refers to the mining area as 
            "the Land of the Green Stone". In 421 AD Olympiodorus visited the 
            south of Egypt. In his account of his voyage he mentioned he had to 
            obtain permission of the king of the Blemmyes, who controlled the 
            area by that time, in order to visit the mines.