1. The most common scale of measurement is the ordinal Mohs hardness scale . 2. "' Christite "'is a mineral with the chemical formula Mohs Hardness Scale . 3. It has a relative hardness of 8-9 on Mohs relative hardness scale . 4. However, there is not always a simple relationship between the various hardness scales . 5. He refers to using one hard mineral to scratch another, presaging the Mohs hardness scale . 6. Measured on a hardness scale called Rockwell C, both achieve a rating of around 60. 7. Its Mohs hardness scale is 4.5-5. 8. Changbaiite has a hardness of 472.4 kg / mm 2 on the Vickers hardness scale and 5.3 on mohs scale. 9. The harder the material to our informal perception, the greater the number it will achieve on our respective hardness scales . 10. On a hardness scale of 65A to 100A, all Penny wheels are rated at 83A, making them ideal for cruising.
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