Diamond
Diamond 10
Diamonds are the HARDEST natural material. Mankind has created harder artificial materials.
Diamonds are the hardest known substance
YeS...
Diamond
Diamond is the hardest mineral currently known and is an allotrope of carbon.
Diamond is the hardest known substance.
No, diamond is the hardest known natural substance in the world.
Diamond is still the hardest substance known to man. Various carbides such as tungsten carbide, boron carbide, and silicon carbide are also extremely hard, but you will notice that they all contain carbon (diamond is pure carbon - the rest are carbon compounds.)
That would be the diamond my friend
Pigpen
Diamonds.