In the near future, a lunar mining expedition discovers a new mineral, Unobtanium. This mineral displays remarkable properties, not the least of which is it has a hardness of 11 on Mohs scale. In order to form a gemstone out of this new mineral, what should a gem cutter use to cut and polish the facets?
A. Unobtanium
B. Corundum
C. Diamond
D. Chrysoberyl
E. Anything harder than quartz
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