Quartz table is marked with a lot of lines, you can dro one or two drops of water on the table, and then squeeze a little toothpaste rub , you can remove the lines and make the table a new.
石英表蒙被划出很多道纹以后，可以在表蒙上先滴一二滴清水，再挤一点牙膏擦涂，就可以把划纹去掉而使表蒙如新了。
In the mineral table of hardness, it has a rating of 8, which means that a knife cannot cut it, and that topaz will scratch quartz.
在矿石硬度表上，它的硬度为8，这表明刀子不能割开它而它可在石英上划痕。
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