I have often admired gorgeous embroidery patch designers. Their creations are meant to be appliqued onto jackets and other accessories. These are like sewn or iron on and washable brooches! I also wonder if one could simply attach brooch findings to the backs so they can be easily transferred to other clothing.
One outstanding embroidered patch applique designer is Lithuanian Inga Ju of OhMyCrown. She finds inspirations for her stunning pieces from a variety of sources such as nature, books, fantasy creatures and so on. It was soooooo very hard to pick my favorites. I bet you will have difficulty choosing too as she has so many in her collections.