This bracelet is strung with beads of goldsheen obsidian. The beads are smooth and polished and are strung together on an elastic cord. The beads are all fairly uniform in size, a little larger than about 1/4 inch in diameter, and vary somewhat in color and pattern from one to the next.
Obsidian is a naturally-occurring gemstone, and like all natural materials, can vary considerably in color, pattern, clarity, etc. Your bracelet may vary from the one shown in the photos.