You fool on the spectrum diamond is DIRT compared to concrete!
Well actually, 'dirt' is a relative term. People use it to describe something as worthless.
However, the fact the context of the sentence is mostly compiled together as phrases for minerals and harder substances, or shall you, 'rocks', makes the term 'dirt', seem like an irrefutably harder substance, also known as 'rocks'. Seeing as concrete is mostly made of these so called rocks, dirt as you call it, would somehow be able to bend the light and matter of the concrete and penetrate it. And, if you are so sure of yourself, how would someone even make a dirt shovel anyhow? The most effective way of penetrating concrete, is throwing a bag, chalk full of dirt, onto it.
