Question

. Which one of the following is the hardest natural material?​

Answer 1

Answer:

Diamond is made of carbon but it is harder than coal

Answer 2

Answer:

diamonds

diamonds may be the hardest naturally occurring substance found on earth, he explains, they are not the hardest available (there are two harder substances - a laboratory synthetic nanomaterial called wurtzite boron nitride and a substance found in meteorites called lonsdaleite).