How to tell the true from the false Bian Shi? Grandpa likes Bian Shi very much recently, and bought a lot of thirty or eighty yuan for his family. How to tell the true from the false? The identification method of Zou bian stone is: 1, and the crystal size of bian stone. Spin Bian Shi mineral crystal size is small, about 0.03mm, with fine surface and high polishing degree. Take the scraping board as an example. The real Spence Stone can be directly dipped in clean water and scraped without scraping oil. When buying, you should read the test report of mineral crystal size clearly. 2. Far-infrared effect of bian stone. Wearing or using bian stone can speed up the blood flow of human microcirculation by 20%, which is called activating qi and promoting blood circulation in Chinese medicine, and can be explained as "far infrared phenomenon" in modern science. Therefore, bian stone with far infrared characteristics is a good bian stone. 3. Bian Shi's ultrasonic pulse. When Sibin Bian Shi rubs against human body, it will produce 3708 ultrasonic pulses with frequency range of (200-2000)kHz, which is much higher than other materials. This is why Bian Shi Scraping Board is more suitable for scraping. When buying, you should read the ultrasonic parameter test report of the product clearly. 4. Bian Shi products with medical device license. Bian Shi belongs to the category of medical instruments of traditional Chinese medicine. Only the products approved by the Food and Drug Administration are formal, and only when they act on the human body can they play a role in regulating diseases. 5. Bian Shi Tongrentang. As Bian Shi products of Tongrentang have always been the best sellers and have the best reputation, many merchants have recently made false propaganda under the guise of "Tongrentang". Tongrentang only sells "Sibinbao" brand Bian Shi products in recent ten years, so consumers should recognize the brand clearly when buying. I hope my answer can help you and be adopted! It is most appropriate to describe the current chaotic situation in Bian Shi market with "shoddy, fake and shoddy". The reporter's investigation found that almost all the low-priced bian stone products on the market and online have problems such as rough production process, unknown composition, fraudulent use or tampering with test reports, and belong to the "three no products" explicitly prohibited by the state. Here, the reporter reminds everyone that wearing or using inferior stone containing harmful radiation or heavy metal substances will not only have no health care effect on the human body, but also have a negative impact on our health. Three tricks of low-quality bian stone speculation: color, origin and standard "Sibin pumice, its true color is mysterious and yellow". This is the description in ancient books of the color of Spencer's pumice, the raw material of Spencer's Stone, and the "mystery" here is interpreted as "black" (Xinhua Dictionary, page 542). The pumice skin in Sibin is grayish yellow, but it is black after polishing and grinding. It will turn black and shine after long-term absorption of human body oil, and it is a black beautiful stone. Because many consumers don't understand the word "Xuan", businesses interpret this word as red or brown to promote their products. Therefore, it is the speculation intention of some vendors to distinguish purchases only by the color of bian stone. The raw material of authentic Bian Shi in Sibin comes from the ancient Sishui River Valley which flows through many provinces. This does not mean that it is not necessarily a Peking duck, but it is definitely not a Bian Shi produced in Surabaya. At present, in order to make huge profits, some businesses are frantically tampering with and speculating on the concept of bian stone origin, regardless of consumers' health. All kinds of stones with unknown quality, rough appearance, different specifications and different colors are born crazily, which leads to the fact that "Surabaya" stone is called bian stone, which is a fallacy that stones can cure diseases. According to the reporter's investigation, there is no unified national standard for bian stone products as medical devices. Some enterprises boldly use the name of national units and frantically guess their own standards for various Bian Shi products. The ultimate goal is profit-driven, so that consumers can save more money. Low-priced Bian Shi = Inferior Stone Avoidance Detection The reporter randomly bought some Bian Shi with a price of about 30 to 50 yuan from Taobao, and entrusted the Tsinghua University Testing Center to carry out elemental detection on the purchased Bian Shi.