Are pearler beads the only beads that you can iron?

No, pearler beads are not the only type of beads that can be ironed. Other types of fusible beads, such as Hama beads and Nabbi beads, can also be melted with an iron to create designs. However, caution should be taken with different materials, as not all beads are suitable for ironing. Always refer to the manufacturer's guidelines for best practices.