Yes, the mineral we know as diamond is harder than any steel. Diamond is the hardest substance we know of.
Diamond is the hardest natural mineral; nothing is harder.
Nothing.
No, diamond is harder than enamel.
No. Diamond is harder than emerald.
Diamond is harder than onyx.
Diamond is harder than plastic.
there is nothing harder than a diamond and diamonds are sublime i.e they turn to vapour in extremely high temperatures
nothings harder than a diamond
Diamond is harder than any metal.
Yes, diamond is harder than granite. Diamond is the hardest mineral known. And it is several times harder than granite.
Diamond is harder than steel: you can scratch steel with a diamond, but steel will not scratch a diamond.