Tube type recycled glass beads. There are various manufacturing methods for glass beads, but almost all glass beads are made of so-called "recycled glass", especially in Java. Originally it was a plate glass or a bottle, but the waste glass is melted and made into beads, but in rare cases, the method is to shape the debris without melting it and make a hole to make it into beads. At our shop, we call such beads "recycled glass beads" to distinguish them from others.
