I'm currently using a Pur Minerals blush. I've gone through three compacts from this brand already, however, the blush doesn't last long on my cheeks. Throughout my eighth hour workday, the color vanishes slowly. I like this brand only because it doesn't cause my sensitive skin to breakout unlike MAC. Don't know whether it's the brand, color, or just my face that can't seem to hold on. Do any of you use a primer prior to blush application? Is there a recommended mineral blush that will keep in its place throughout the day?