Can gold foil be recycled as gold?

Gold foil is very thin and has no economic value of recycling. Gold foil is a thin sheet hammered with gold. One or two pure gold can be hammered into gold foil with a thickness of one tenth of a millimeter and an area of 16.2 square meters because of its good ductility and plasticity. That is, one gram of gold can be made into pure gold foil of about 0.5 square meters, with a thickness of 0.12 μ m. The gold foil is widely used, involving Buddhism, classical gardens, advanced buildings, medical care and cultural undertakings. Nanjing is the birthplace of gold foil in China. In China, gold foil is a traditional handicraft of the Chinese nation. Originated in the Eastern Jin Dynasty, it matured in the Southern Dynasties and was popular in Song, Qi, Liang and Chen Dynasties.