The article explores Serabit el-Khadim, located on the Sinai Peninsula, which was known to the ancient Egyptians as the "mountain of turquoise." Topics discussed include the three major sites Bir Nasib where they mined copper-bearing ores such as malachite, Wadi Maghara where they obtained turquoise and Serabit el-Khadim and the ruined temple of Hathor.