Incense ash bracelets are made of porcelain or glass from incense ashes left by pilgrims worshipping Buddha, so they are called incense ash bracelets. The bracelets of eighteen beads are the most common, and most of them are made of precious materials or brightly colored. The color of the beads on the bracelet must be uniform, and good materials are required, with little color change, moist and delicate, and smooth.