That is actually the most common low-grade jewelry on the market now. The so-called "natural magnetic black stone" is just magnetite, which is nothing special at all, not to mention the effect of "promoting blood circulation can help cells to metabolize and treat joint pain"!

It is understandable to wear such low-grade jewelry for fun, but it is wishful thinking to expect it to cure diseases ~ ~ ~

If you buy such a magnetite bracelet in the jewelry wholesale market, 10 yuan can get five pieces!

So, it must have been slaughtered. Be careful next time ~ ~ ~