Cedar made this great necklace from some of my dad's Salina Canyon Wonderstone. Wonderstone is a type of jasper that is basically metamorphosed volcanic tuff. It's typically crack free and one of the easiest rocks to work into beautiful jewelry. It's possible to shape and drill with a handheld Dremel tool! (But I think Cedar used regular lapidary equipment.)
Cedar's mom actually sent the picture to me. Thanks Mom!