This bracelet is my newest favorite:
The Dragonfire bracelet is created with 12mm round Lava Stone beads and 12mm Dragon Blood Jasper beads. We almost always have Lava Stone in a variety of sizes, but we can’t always get 12mm Dragon Blood Jasper. Lizardite and Kambaba Jasper are excellent alternatives. The beads are strung on size 6 (0.7mm) silk cord, which is wrapped onto 4-strand braided leather cord (this type of braided leather cord is normally used for Southwestern bolo ties). Complete parts and instructions for this bracelet are here.