The rose one is made from this free pattern from Lion brand yarn. Its very quick and easy to make. I made the medium size with a 4mm hool and cheap dk acrylic yarn. The one with the button was made using similar techniques.
I don't really wear brooches but am having fun making them. They're easy and quick. Its great to finish a project in a couple of hours. In fact- can you call it a project if its done so quickly?