Sea Glass lampwork canes were once long pieces of colored glass used in a process called “lampwork”, as well as other decorative glass-blowing techniques. This unusual sea glass is generally found where old glass factories or glass blowing studios were once located. They would toss the remnants of the day’s work into the sea, where it would be tumbled by the ocean waves for a hundred years or so, yielding these beautifully frosted glass canes.