Question

This mineral is composed only of one element, carbon. It is listed as the hardest on MOHs' Scale of Hardness. Which mineral is this?
A) diamond
B) gold
C) gypsum
D) quartz

Answer 1

Answer:

The correct answer is A) diamond

Explanation:

A is correct answer because only two minerals are composed of only one element, carbon and that are diamond and graphite.

All other answers are wrong, as they are not composed of only one mentioned element.