answersLogoWhite

0

Diamond is no longer the hardest known substance. Several new compounds have beaten it.

--------------------------------------

Because only another diamond can scratch another diamond. Also they use diamond made drills. My daddy told me that. But it is the hardest. My friend Joshua told me that about the only thing that scratch it. I thought the pavement was the hardest.

From Marlon

User Avatar

Wiki User

13y ago

What else can I help you with?