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05-18-2016, 08:19 AM
Thread: Arkansas hardness
by hatzicho- Replies
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The translucent Arks are as hard as quartzite,...
The translucent Arks are as hard as quartzite, means the hardness is in a region of 7 according to the Mohs scale. For comparison Carborundum has a Mohs hardness of 9, diamond 10. The scale used with...
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