Emerald is one of the four precious stones. Emerald is the most precious member of the green cornerstone clan, and its expensive price can be comparable to that of diamonds. Emerald is the birthstone of May, symbolizing beauty. Emerald has an auxiliary therapeutic effect on the recovery of infected patients, and can also be used as an antidote to enhance the detoxification function of the liver. Emerald helps to treat sinus node, lung, heart, spine and muscle diseases; Together, it can also improve vision, relieve eye fatigue and relieve symptoms of rheumatism and diabetes. Wearing emeralds around your neck can also avoid epilepsy.