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Appendix M

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<strong>Appendix</strong> E<br />

Vickers Hardness Number (VHN) for almindelige mineraler. [11]<br />

MINERAL VHN (KG/MM2)<br />

Corundum 2300<br />

Quartz 1060<br />

Garnet 1060<br />

Olivine 980<br />

Hematite 925<br />

Pyrite 800<br />

Plagioclase 800<br />

Diopsid (clinopyroxene) 800<br />

Magnetite 730<br />

Orthoclase (alkali feldspar) 730<br />

Augite (clinopyroxene) 640<br />

Ilmenite 625<br />

Hypersthene (orthopyroxene) 600<br />

Hornblende (amphibole) 600<br />

Chromite 600<br />

Apatite 550<br />

Dolomite 365<br />

Pyrrhotite 310<br />

Fluorite 265<br />

Pentlandite 220<br />

Sphalerite (zinc blende) 200<br />

Chalcopyrite (copper pyrite) 195<br />

Serpentine 175<br />

Anhydrite 160<br />

Calcite 125<br />

Biotite 110<br />

Galena (lead glance) 85<br />

Chalcosite 65<br />

Chlorite 50<br />

Gypsum 50<br />

Talc 20<br />

Halite (rock salt) 17<br />

Sylvite 10<br />

I

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