No. coal is coal and diamond is diamond. They are both formed from carbon, but diamond is much harder than coal.
No, diamond is harder than enamel.
Anthracite coal is harder than Lignite.
Coal is considered to be a rock.
Yes, harder than any metal.
No. coal is coal and diamond is diamond. They are both formed from carbon, but diamond is much harder than coal.
No, diamond is harder than enamel.
No. Diamond is harder than emerald.
Anthracite coal is harder than Lignite.
Diamond is harder than onyx.
Diamond is harder than plastic.
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.
Coal is considered to be a rock.
Yes, harder than any metal.