![](https://nthumb.tpgimages.com/mid2_com_img/16166/20432/TOP19705672.jpg)
The Mohs scale compares the hardness of minerals on a scale of 1 to 10, from the softest (1) to the hardest (10). Each mineral is classified according to how it scratches the others or is scratched by them. Topaz has a hardness of 8.
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TOP19705672
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達志影像
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