The technique of creating crackle glass was invented by Venetian glass makers in the 16th century. The crackle bead is made by immersing in cold water while the glass is molten hot. This causes the glass to crack. It is then re-heated, and then either moulded or hand-blown into the desired shape. It is the re-heating of the glass after it is cracked which seals the glass and gives the surface its lovely smooth feel. Crackle beads are beautiful & vibrant beads, adding life & beauty to jewellery and craft creations.