These are glow-in-the-dark type Hotaru glass that store light in bright places and glow in dark places. "100 yen off from the second item" Hotaru glass sizes are determined by the craftsman's intuition, and there may be variations in size, dents, and cloudiness depending on the daily climate, so please understand this before purchasing. Hotaru glass is a glass bead with a hole, made using a molding technique called burner work, similar to tonbo-dama (glass beads). Craftsmen melt colored glass one by one and round it on an iron core, then layer silver foil on the molten glass, which is like syrup, and express beautiful colors using a special technique. Hotaru glass Okinawa tonbo-dama tonbo-dama tonbo glass Ryukyu glass fluorite hotaru stone hotaru glass bracelet Kabira Blue ---------------------------------------------------