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Copper Flash Smelting Finland Mobile Granite Crusher In Congo

To test a new specimen, a smooth surface is selected, and rubbed with a tool or standard specimen.A fingernail will scratch to a hardness of 2 , copper penny 3, and penknife 5.In general, a scratch will appear when a standard mineral of equal or greater harness is used.11 2008 stantec consulting ltd.H a r d r o c k m i n e r s.

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