Mineral Mohs scale Valuation
Quartz 7
Feldspar 6 “hard”
Pyroxene 6 minerals
Amphibole 6
Calcite 3
Dolomite 3.5
Mica 3 “soft”
Chlorite 2 – 3 minerals
Clay minerals 2
Mineral Mohs scale Valuation
Quartz 7
Feldspar 6 “hard”
Pyroxene 6 minerals
Amphibole 6
Calcite 3
Dolomite 3.5
Mica 3 “soft”
Chlorite 2 – 3 minerals
Clay minerals 2
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