IceStone is a sustainable and durable surface, made from three core ingredients: 100% recycled glass, portland cement, and non-toxic pigments. The surfaces are an alternative to quarried or engineered stones. Variation in glass size, shape, colour and gauge are inherent to the IceStone slabs, which are hand crafted. IceStone surfaces are manufactured without any petrochemicals or (synthetic) resins. The high-density IceStone slabs rival the strength of granite. The surface is very dense, but still porous; it requires regular application of a penetrating sealer and wax. Staining and etching is possible, but can be removed. Depending on the color, IceStone is 68%-75% recycled glass, 15-20% white Portland cement, and small percentages of pigments and proprietary ingredients. IceStone has achieved the Cradle to Cradle™ Gold level certification.