What is harder a diamond or iron?

Answer 1

Diamond by far, is harder than steel.

Steel is an alloy of constituents being iron and carbon as the major ingredients. It is hard due to the interaction between iron and carbon molecules which causes them to stay binded together giving strength.

Diamond, on the other hand, is solely made up of carbon (diamond is an allotrope of carbon). The attracting force and the perfect stable geometry gives carbon a lot of strength, making it the hardest natural substance ever known.

Answer 2

Diamond, with a Mohs hardness of 10, is roughly 10 times the hardness of hardened steel with a Mohs hardness of 7.5, and 25 times the hardness of an average steel knife blade with a Mohs hardness of 5.5.

Answer 3

Yes, diamond is harder than any steel. It (diamond) is the hardest of all known substances.

It might worthy of note that diamond is hard only againstits planes of cleavage. If stress is applied along a plane of cleavage, a diamond can be broken quite easily.

Answer 4

For sure it is diamond, iron could be broken with a great force, though diamond can't break even if a whole planet fell on it.

AND...iron can be molten at high temperature, though diamond need extremely high temperature so its shape could be slightly enhanced. ;)

Answer 5

diamond

Answer 6

myes

Answer 7

no

Answer 8

diamonds

Answer 9

diamond