The top three most popular bead forms in jewelry-making are rondell beads. The rondell shape is particularly well suited to use as spacer beads. Just like any other variety of beads, rondell beads have different types too. They're ideal for constructing bracelets and necklaces, among other things. Each bead is handcrafted from natural gemstones, has a rondell shape, and is smooth. The act of contracting into a series of wrinkles or opposing ridges and grooves is known as corrugation.