MOH Chart PDF Print E-mail
Material
Mohs' Hardness
Alumina (Synthetic aluminum oxide) 3.4
Aluminum oxide 9
Alundum (Fused brown Al203) 9.0
Amalgam 4 - 5
Anatase 5.5 - 6
Apatite 5
Barium sulfate 3
Boron carbide 9 - 10
Burundum 9+
Calcite 3
Chalk (calcium carbonate) 3
Chrysoberyl 8.5
Copper slag 7
Corundum (Natural aluminum oxide) 9
Crystolon (SiC) 9.0
Cuttlebone 7
Dentin 3 - 4
Diamond 10
Diopside 5 - 6
Emery 7 - 9
Enamel 5
Enstatite 5.5
Feldspar 6
Fluorite 4
Furnace slag 7
Garnet 6.5 - 7.5
Glass (lead free) 7
Glass Bead 5.5
Gold 2.5 - 3
Gypsum 2
Hematite 5.5 - 6.5
Kyanite 4 - 7
Magnetite 5.5 - 6.5
Olivine 6.5
Orthoclase 6
Petalite ~ 6
Plastic media 3 - 4
Porcelain, feldspathic 6 - 7
Pumice 6
Pyrite 6.5
Quartz (Silica sand) 7
Serpentine 2 - 4
Silica sand 6 - 7
Silicon carbide 9 - 10
Sillimanite 6 - 7
Soda (Sodium bicarbonate) 2.5
Specular hematite 7 - 7.5
Spinel ~ 8
Spodumene 6 - 7
Staurolite 7.0 - 7.5
Steatite (Soapstone) 1 - 2.5
Steel grit RC= 42 - 62
Steel shot 8 or
RC= 42 - 50
Strontium titanate 5 - 6
Talc 1
Titanium dioxide, Anatase 5.5
Titanium dioxide, Rutile 6.5
Topaz 8
Tungsten carbide 9
YAG ~ 8 1/4
Zinc sulfide 3
Zirconia 8
Zirconium silicate (Zircon) 6.5 - 7.5


 
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