Since you said you'd like maybe some Swarovski, here's a link to what I've been using lately. They are super pretty! They are filigree metal beads with 2 colors of Swarovski crystals in them. They come in 2 sizes. A little more pricey, so I would use them carefully. But I just love them! Here's the address to one of the pages that uses colors that would match that pretty pendant.
http://store.goodybeads.com/store/products/SW00267.html
You should post a photo of what you end up with once you're done!