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5 votes
Diamond is ____?

A a nonmetallic element
B an isotope of silicon
C the hardest mineral on the mohs scale
D the only mineral with luster

User Teastburn
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2 Answers

3 votes
C because people talk about how diamond is hardest substance/mineral
User Arcturus B
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8.4k points
7 votes
The answer is C the hardest mineral on the mohs scale
User Shameel
by
8.8k points
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