All of our mala bead jewelry is handcrafted using only the highest-quality materials, such as sustainable wood beads and all-natural, semi-precious gemstones. We use a lead-free pewter metal for elements like our charms, guru beads and cones, and spacer beads. We chose to use pewter because it doesn't tarnish the way metals like sterling silver and brass tend to do, and our pewter is safely manufactured based on the California Jewelry Act standards. For the tassel and cords, we use a high-quality polyester thread, which we chose for its durability, drape and wide array of colors.