Mohs scale of mineral hardness
To determine the hardness of a mineral or a hone, we are using the scale of mineral hardness by Friedrich Mohs. It is based on "what scratches what".
| Substance or Mineral
| Hardness
|
| Diamond
| 10
|
| Corundum (Al2O3)
| 9
|
| Carborundum (SiC)
| 9
|
| Ruby
| 9
|
| Saphire
| 9
|
| Chrysoberyll
| 8,5
|
| Spinell
| 8
|
| Topaz
| 8
|
| Beryll
| 7,5 - 8
|
| Emerald
| 7,5 - 8
|
| Wolfram
| 7,5
|
| Garnet
| 7- 7,5
|
| Zircon
| 6,5 - 7,5
|
| Amethyst
| 7
|
| Quartz
| 7
|
| Citrin
| 7
|
| Tiger Eye
| 7
|
| Agate
| 6,5 -7
|
| Jadeit
| 6,5 - 7
|
| Jaspis
| 6,5 - 7
|
| Carneol
| 6,5 - 7
|
| Moss-Agate
| 6,5 - 7
|
| Onyx-Chalcedon
| 6,5 - 7
|
| Labradorit
| 6 - 6,5
|
| Moon stone
| 6 - 6,5
|
| Pyrite
| 6 - 6,5
|
| Titan
| 6
|
| Haematite
| 5,5 - 6,5
|
| Opal
| 5,5 - 6,5
|
| Beryllonit
| 5,5 - 6
|
| Glass
| 5 - 7
|
| Lapislazuli
| 5 - 6
|
| Obsidian
| 5 - 5,5
|
| Turquoise
| 5 -6
|
| Iron
| 4,5
|
| Platinum
| 4,3
|
| Rhodochrosit
| 4
|
| Nickel
| 3,8
|
| Malachite
| 3,5 - 4
|
| Coral
| 3 - 4
|
| Pearl
| 3 - 4
|
| Calcit
| 3
|
| Silver
| 2,7
|
| Jet
| 2,5 - 3,5
|
| Gold
| 2,5 - 3
|
| Copper
| 2,5 - 3
|
| Zinc
| 2,5
|
| Seafoam
| 2 - 2,5
|
| Amber
| 2 - 2,5
|
| Ivory
| 2 - 3
|
| Alabaster
| 2
|
| Tin
| 1,8
|
| Horn
| 1,5 - 2,5
|
| Lead
| 1,2
|
More information about this scale can be found in Mohs scale of mineral hardness.
|
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Mohs scale of mineral hardness
