1.
Which mineral is the hardest known natural substance?
A
Graphite
B
Diamond
C
Quartz
D
Talc
View Answer
Correct Answer: B — Diamond
Explanation:
Diamond is the hardest naturally occurring mineral.
1 practice sets · Page 1 of 1
Which mineral is the hardest known natural substance?
Graphite
Diamond
Quartz
Talc
Correct Answer: B — Diamond
Explanation:
Diamond is the hardest naturally occurring mineral.