Hardness of prominent abrasive materials

Hardness of prominent abrasive materials

Table
Hardness of prominent abrasive materials
abrasive materials hardness
Mohs scale (Mohs hardness) Vickers scale (Vickers hardness) Knoop scale (Knoop hardness)
Natural abrasives
industrial diamond 10 10,000 8,000
corundum 9 2,200 1,600-2,100
emery 7-9 1,600 800-1,800
garnet 7-8 1,100-1,300 1,300-1,350
flint (chert and flint) 7 900-1,100 700-800
quartz 7 1,100 700-800
pumice 5-6 — 430-560
talc 1 — —
Synthetic abrasives
synthetic diamond 10 10,000 8,000-10,000
boron nitride (cubic) (boron nitride) 10 7,300-10,000 4,700-10,000
boron carbide 9-10 3,300-4,300 2,200-5,100
silicon carbide 9 2,800-3,300 2,000-3,700
alumina 9 2,200 2,000-2,600
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Universalium. 2010.

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