IceStone diverts about a million pounds of glass from the waste stream-which would ordinarily end up in dumps-each year, and creates concrete countertops. Only diehards could get this excited about countertop colors. "We think Gotham Grey is a perfect representation of the mystery and sparkle and glamour of the product," Corey said. A tiny sample of Gotham Grey, IceStone's newest color. The glass is then mixed with concrete and pigment. "It's very much like baking bread," said Corey.