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Is crystal really useful?
Crystal ornaments that look crystal clear and very cool are now liked by many people. There is also a saying among many consumers that crystal has health care function, and people who sell crystal also use it as a selling point to attract consumers. For example, it is said that crystal has powerful energy and magnetic field, which can ward off evil spirits and diseases and release negative energy in the body; Or crystal is beneficial to the health of reproductive system and related organs, and can treat female dysmenorrhea. In fact, these statements have no scientific basis. \x0d\ crystal is a natural high-purity timely ore. Its main component is silicon dioxide. Because it contains other metal ions, it will show various colors, such as white crystal, amethyst, topaz, tea crystal, hair crystal and so on. People often say that crystals have magnetotherapy effect, which refers to the "piezoelectric effect", that is, after cutting off a wafer of crystals and applying pressure to it, magnetic fields can be generated on both sides of the wafer. There are also clinics abroad that use this effect of crystals to treat patients. However, the crystal can not produce this effect under normal circumstances, and the current research results are not very accurate. \x0d\ Just wearing crystals can't cure diseases. Li Shizhen's Compendium of Materia Medica pointed out that crystal can cure diseases mainly because of its cold and cool characteristics. For example, grinding it into powder and adding it to eye drops can cool down and remove heat. \x0d\ When buying crystal ornaments, it's best to check whether there is a "quality standard certificate", because some merchants often use dyeing, heating, radiation and other methods to change the color and impurities of crystals with poor color and quality, and turn colorless and yellow crystals into higher-grade crystals such as smoke and purple. In irradiated crystals, radioactive elements continue to decay, which will do harm to the health of people with crystals.