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Shitou zhentou (Chinese for rock pillow) played an important role in ancient China. Made from jade, it was believed to translate the energy from the stone to the human brain. Derived from the Ming dynasty, this piece of material was trusted to cure headaches or depressions, or simply to better the intelligence of those who use it. It was more common in the royalties because it was expensive and rare. Families often married off children based on the quality and intricacy of these pellows.[14] Today, rock pillows are still commonly used during the hot summer months in China.
Pretty amazing!
