A technique called watercolor or sometimes the torn effect. I made several bookmarks from this and they hold up so well. Won't ever tear or frazzle like paper ones do.
I grew up with art supplies and projects always taking place in my home. My love of creating grew from 1970s macrame, pasta picture art and pink bunny ceramics thanks to my mom.
My medium of choice is polymer clay, from which I craft my jewelry, sculpture and assorted doodads.