also note that Mohs is a qualitative ranking rather than a linear scale. Huuuuuge difference in hardness at the top end.[0] [0] https://geology.com/minerals/ph

also note that Mohs is a qualitative ranking rather than a linear scale. Huuuuuge difference in hardness at the top end.[0] [0] https://geology.com/minerals/photos/mohs-vickers-comparison-scale.gif https://geology.com/minerals/photos/mohs-vickers-comparison-...