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mohs_scale_metal_hardness_list

Mohs Scale

The Mohs Scale of Hardness for Metals

The Mohs scale is a system used to rank materials on their hardness, which is graded using numbers from 1 to 10. It can be used to compare gemstones, metals and other materials, and evaluate their relative durability.

To use an example, one of the hardest substances on earth, diamond, is rated 10 on the Mohs scale, while plastic and pencil lead, for instance, are on the other end of the scale, with a hardness grade of 1.

  • Lead: 1.5
  • Tin: 1.5
  • Zinc: 2.5
  • Gold: 2.5-3
  • Silver: 2.5-3
  • Aluminum: 2.5-3
  • Copper: 3
  • Brass: 3
  • Bronze: 3
  • Nickel: 4
  • Platinum: 4-4.5
  • Steel: 4-4.5
  • Iron: 4.5
  • Palladium: 4.75
  • Rhodium: 6
  • Titanium: 6
  • Hardened steel: 7-8
  • Tungsten: 7.5
  • Tungsten carbide: 8.5-9
  • Diamond - 10
  • Ruby and Sapphire - 9
  • Topaz and spinel - 8
  • Emerald and aquamarine - 7.5 to 8
  • Amethyst, smoky quartz, tourmaline and citrine - 7
  • Tanzanite, tsavorite and peridot - 6.5 to 7
  • Moonstone and jade - 6 to 6.5
  • Opal - 5.5 to 6.5
  • Turquoise - 5 to 6
  • Pearl - 2.5 to 4.5
  • Amber 2 to 2.5
mohs_scale_metal_hardness_list.txt · Last modified: 2020/02/17 22:49 (external edit)