asked 77.2k views
2 votes
What is the hardest mineral in this group?

A. Calcite
B. Quartz
C. Diamond
D. Gold

asked
User Thabani
by
8.5k points

2 Answers

4 votes
C. Diamond, It one of the hardest known rock on the earth
answered
User Romi
by
8.6k points
1 vote
Diamond is the hardest mineral on Earth.
answered
User Liubo
by
8.6k points
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