ADNR's are a special manmade form of pure carbon that are harder (and denser) than natural diamonds and manmade ultrahard fullerine. I believe the answer is lonsdaleite. It is naturally made and is 58% harder than diamonds.
The hardest element is chromium, which is in group 6.
The hardest element is chromium, which is in group 6.
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.)
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There is actually no scientifically accepted 'hardest' substance known to man and there are a lot of debates over this.It's a common misconception that diamond is the hardest but variations of substances like Boron and minerals like Lonsdaleite are actually tougher than diamonds.
Diamond is the hardest known natural material on Earth, scoring a 10 out of 10 on the Mohs scale of mineral hardness.
Diamonds are the HARDEST natural material. Mankind has created harder artificial materials.
Diamond is the hardest mineral mined in the north of Western Australia. It has a hardness of 10 on the Mohs scale, making it the hardest natural material known to man.
Diamond
Pigpen
Diamonds.
The hardest element is chromium, which is in group 6.
The hardest element is chromium, which is in group 6.
It is Beta Carbon nitride ( β-C3N4)
I am the hardest riddle alive! wich comes first the Lego or my ego?
Diamond 10
Diamonds