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What can scratch fayalite but can't scratch orthoclase but not topaz

What can scratch fayalite but can't scratch orthoclase but not topaz
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What can scratch fayalite but can't scratch orthoclase but not topaz

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User LadIQe
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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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User Emyller
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