Most of the pyrites consumed in the United Kingdom come from Spain; this Spanish pyrites generally (not always) contains enough copper (say 3 or 4%) to make its extraction from the residues ("cinders) a paying process, and this of course cheapens the price of the sulphur to the acid manufacturer.
This often cheapens a pen and the recipient takes little notice.
It's also so freely available it just cheapens it innit.
It cheapens astronomy, like using Beethoven for commercial jingles.
Telling someone it's over via text messaging cheapens the relationship and leaves a lot of questions unanswered.