If you find it useful, you can use these methods next time you buy quartzite.

　　Put the lighted cigarette end on the table, or burn it directly with a lighter. There is no trace of genuine goods, and there is a black mark of fake goods. This is the simplest thing. Businessmen dare to burn it for you is generally true; or put the burning cigarette end on quartz stone, without discoloration.

　　Soy sauce can be poured on the quartz table to check whether it will seep, poor quality quartz table on a day of seepage, high quality will not.

　　Low-quality quartzite will have a pungent taste, but high-quality quartzite will not, high-quality quartzite does not contain residual solvents, no pungent chemical odor.

　　The steel knife scratches, leaving a white print of pseudoquartzite, because the hardness of the plate is not as good as steel, the steel knife cut the surface, revealing the white inside. The pure quartzite cut by the steel knife will only leave a black mark, which is caused by the impracticability of the steel knife on the quartzite, but by the traces of the steel, a black and white, true and false.