I saw these Tibetan beads and it was love at first sight, I have decided that I must be a collector since I have so many. The end caps are made using a method of silversmithing called repousse. The end caps are attached to the bead and they are sterling silver. A few are some other composite metal, possibly brass. I like them all. I put them together with Greek leather usually. The top photo is a bracelet where I used the 4mm Greek leather with one of the turqouise beads and the bottom one I combined the bead with AAA turquoise and seamless sterling silver and coral.