I do use a grinder that is in perfect condition, its not from the grinder. The grinder is space grade aluminum....non magnetic metal. I can see this happening with a messed up trimmer, but it looks intentionally done.....theres way more than what you see there......ground it up and used a magnet and pulled quite a bit of powder which had a redish brown to it....at first glance looks like keef, but its magnetic......personally thing some scumbag did it on purpose, got my money back and some extra compensation for my troubles.
It personally disgusts me as a 99% organic grower that people would do this to add a few measly grams