GREY:WFEMF - Post by User
Comment by
nickgeoon Jun 26, 2014 4:12pm
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Post# 22698202
RE:maybe they need to use diamond bits because
RE:maybe they need to use diamond bits becauseHi,
They are not drilling through tungsten metal. The W ore is scheelite, Mohs hardness 4.5-5. Such common minerals in the mine as amphibole, garnet, and quartz are harder.
Take care,
Nick