A couple people noticed my matrix board at our recent clay weekend so I figured I’d mention it here. If you don’t know about having your own stamps made at Ready Stamps, you should check it out.
You pick or create your own black and white artwork, send it in, and get back a sheet of stamps relatively inexpensively. Dover books are great resources for images, or look for other copyright free sources if you don’t want to draw your own.

Renaissance Faire necklace
The best thing though, is that you can request all the parts that they use to make the stamps – you can get the matrix board which is a reverse of the stamp, as well as the acrylic/clear stamps – think innie and outie. That way you double your design potential from the same images.
Sarajane has all the info over on her website so I won’t repeat it here – http://www.polyclay.com/ready.htm – but it’s well worth it.
The links in the necklace above were made from pressing clay into the matrix board.