What is "icestone"

IceStone, LLC is a Brooklyn, New York manufacturer of durable surfaces composed of recycled glass and cement. IceStone's eponymous surface is marketed as a sustainable alternative to conventional stone surfaces, and is typically fabricated into countertops, backsplashes, and bathroom vanities. IceStone is one of twenty companies in the world (and the only durable surface manufacturer) to hold a Cradle to Cradle Gold certification. The surface is currently on display at the Cooper-Hewitt National Design Museum's 2010 Triennial exhibition.