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The following table shows MOH's Scale of Hardness in relation to Simple and Cutting Hardness. MOH's hardness is a relative scale. It shows which mineral scratches another mineral. (cutting hardness in water according to A. Rosiwal).
MOH's
Hardness
Scale |
Mineral used for comparison |
Simple Hardness |
Cutting
Hardness
(A. Rosiwal) |
| 10 |
Diamond |
Great for Jewelry |
140,000.00 |
| 9 |
Ruby, Sapphire, Alexandrite, Chrysoberyl |
Great for Jewelry |
1,000.00 |
| 8 |
Aquamarine, Green Emerald, Pink Emerald, Spinel, Topaz |
Great for Jewelry |
175.00 |
| 7 |
Amethyst, Citrine, Garnet, Iolite, Kunzite, Peridot, Tanzanite, Tourmaline, Zircon |
Great for Jewelry Scratches window glass |
120.00 |
| 6 |
Diopside, Lapis lazuli, Orthoclase, Turquoise |
Can be scratched with a steel file |
37.00 |
| 5 |
Apatite, Obsidian, Sphene, Glass |
Can be scratched with a knife |
6.50 |
| 4 |
Coral, Fluorite, Pearl |
Can easily be scratched with a knife |
5.00 |
| 3 |
Calcite, Ivory |
Can be scratched with a copper coin |
4.50 |
| 2 |
Amber, Gypsum |
Can be scratched with a fingernail |
1.25 |
| 1 |
Talc |
Can be scratched with a fingernail |
0.03 |
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