I mentioned I had purchased a Jane Iredale mineral foundation recently. This was after a careful try-on in the salon, as I know from recent experience that many mineral makeups lately seem to irritate my cheeks and flare up my rosacea. I wore the JI mineral powder once for a long work day, and it didn't cause any irritation. But I wasn't sure I was happy with the shade match. A sales associate at JI was helpful and sent me some samples of other shades to try. One of them was a dead-on match for my skin tone, but unfortunately, I got raw, irritated cheeks from it. What gives? Is there something in this shade that isn't in the others? Did they reformulate the product? Or has my skin decided it doesn't like this product either? Why do mineral makeups cause irritation? I used to be able to rely on powder foundations to NOT cause the irritation I so often get from liquid makeup. Aargh.