Zodiaq® is composed mostly of quartz, giving it exceptional toughness and a hardness of 7 on a scale of 10 (only diamonds rate a 10!). The smooth, nonporous surface of Zodiaq® resists even the toughest stains and will retain its luster for many years without the need for sealants or waxes. Zodiaq® comes in beautiful, uniform colors that go beyond the palette of unimproved stone. And there are no cracks or irregularities.