Hardness typical value for difference minerals or abrasive grains
COMPARING HARDNESS TABLE
MOH KNOOP ₁₀₀
1 | (Talc) | |
2 | (Gypsum) | 32 |
3 | (Calcite) | 135 |
4 | (Fluorite) | 163 |
5 | (Apatite) | 430 |
6 | (Feldspar) | 560 |
7 | (Quartz) | 820 |
8 | (Topaz) | 1340 |
9 | (Corundum) | 1800 |
Fused Aluminum Oxide Silicon Carbide | 2000-2200 2400-2500 | |
10 | (Diamond) | 8000 |
