Crochet shawls, and scarves look lovely with an added shawl pin.
You can make an easy shawl pin, with just a dowel, and a few beads. If you have access to a drill, you can drill a hole, but if not, you could tighten the wire around the dowel to make it good and secure, the attach another section of wire with beads added to it. Check out the youtube video on how to do that. The link is below the photo.
I can show you how to do that in my youtube video. Check it out here: http://www.youtube.com/watch?v=4cobBW_-bBA&feature=plcp