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Crackle Glass is known by other names: Craquelle Glass, Ice Glass and Overshot Glass. It was the Venetian Glass Makers of the 16th Century that invented this marvelous process. The glass was immersed in cold water while it was molten hot, thereby cracking the glass. The glass was then re-heated and either mold or hand-blown into the shape the glass blower desired. The re-heating of the glass would seal the cracks. If you run your hand over Crackle Glass, you can feel the cracks, but the inside would be smooth to touch. Glass makers today are still using this same method.