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Home / Aptitude Tests / General Knowledge Trivia / What is the hardest ...
What is the hardest mineral on Earth?...

What is the hardest mineral on Earth?

A.

Diamond

B.

Quartz

C.

Topaz

D.

Corundum

E.

Spinel

View answer & explanation

Correct answer is A

Diamond is the hardest naturally occurring mineral, scoring 10 on the Mohs hardness scale.


See all General Knowledge Trivia questions & answers
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