Mohs Scale of Hardness

MOHS SCALE

1–TALC;

2.5–FINGERNAIL;

3–COPPER COIN;

4–FLUORITE;

5–APATITE

5.5–GLASS

6–ORTHOCLASE FELDSPAR

6.5–STEEL

7–QUARTZ

8–TOPAZ

9–CORUNDUM

10–DIAMOND