The main component of bian Shi is microcrystalline limestone, which contains more than 30 kinds of rare earth and trace elements beneficial to human body, such as strontium, titanium, chromium, manganese and zinc. Stones are effective, but don't buy them indiscriminately. The real stone is dark taupe, but now the resources are exhausted and it is difficult to buy. None of them are red, yellow or black on Taobao. The red and yellow ones are called gems, and the black ones are called Lingbi Stone. Real stones have to undergo far infrared detection, radiation protection detection and ultrasonic detection, otherwise they will be used indiscriminately. Wear it on your right hand to absorb your bad energy.