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

asked Dec 2, 2018 77.2k views

2 votes

What is the hardest mineral in this group?

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

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4 votes

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

Romi answered Dec 4, 2018

by Romi

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1 vote

Diamond is the hardest mineral on Earth.

Liubo answered Dec 7, 2018

by Liubo

8.3k points

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