itsisaac itsisaac

15-03-2017
Physics

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What is the hardest mineral in this group?
A. Calcite
B. Quartz
C. Diamond
D. Gold

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Аноним Аноним

15-03-2017

Diamond is the hardest mineral on Earth.

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garrettermi garrettermi

15-03-2017

C. Diamond, It one of the hardest known rock on the earth

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