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10-03-2015
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what can scratch fayalite but can't scratch orthoclase but not topaz

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Аноним Аноним

17-03-2015

Fayalite has a hardness of 6.5-7 on the Mohs scale. Therefore it scratches orthoclase (hardness 6), but not topaz (hardness 8).HOPE THIS HELPS:]

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