Ice-Glass
From Melting Pot Wiki
Also verre craquele, broc a glaces. Know also as 'crackle glass', a paraison of soft glass is plunged into cold water, early in the blowing, fissuring the surface. After slow reheating and final blowing, the web of cracks enlarges, creating a frosted look and a restored surface. The French terms refer to one of two Venetian techniques revived in the 19th century.
