The pyramids on the Giza Plateau were originally covered in polished white limestone that reflected the sun, giving them a shiny appearance. The pyramids also had pyramidions, capstones covered in gold or electrum, which amplified their brightness. Over time, the limestone cladding of the pyramids started disappearing, with some remnants still visible on the Pyramid of Khafre. The electrum-covered pyramidions have been lost to time, likely stolen for their valuable materials.
Original article source: https://www.jpost.com/archaeology/archaeology-around-the-world/article-845423
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