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Mohs' Scale

Mohs' Scale

 

Mohs' Hardness Scale (Extract)
No. Mineral (or other substance)  
10 Diamond  
9 Sapphire,  Ruby  
8 1/2 Cubic Zirconia,  Chrysoberyl  
8 Topaz,  Spinel  
7 1/2 - 8 Emerald,  Beryl  
7 1/2 Almandine Garnet  
7 - 7 1/2 Rhodolite (Rose) Garnet,   Pyrope Garnet,  Tourmaline,  Iolite  
7 Quartz  
6 1/2 - 7 Peridot,  Jadeite,  Chalcedony,  Zircon  
6 - 7 Tanzanite  
6 - 6 1/2 Marcasite,  Pyrite  
6 (Knife Blade)  
5 1/2 - 6 Hematite,  Rhodonite  
5 1/2 Opal  
5 -6 Glass,  Lapis Lazuli,  Turquoise,  Sodalite  
5 - 5 1/2 Obsidian  
5 Apatite  
4 1/3 Platinum  
4 (Sterling Silver)  
3 1/2 - 4 Malachite  
3 1/2 (Copper Penny)  
3 - 4 Coral  
2 1/2 - 4 1/2 Pearl  
2 1/2 - 4 Jet  
2 1/2 - 3 Gold  
2 1/2 Silver  
2 - 2 1/2 Amber  (Ivory,  Fingernail)  
1 1/2 (Human Skin)  
1 - 2 1/2 Soapstone  
1 Graphite,  Talc