Cambria has performed numerous laboratory tests to prove that Cambria natural quartz surfaces are twice as strong as granite. No sealing, polishing or reconditioning is needed. Simply wash with warm water. Cambria has been certified by NSF International for use as a food preparation surface. Cambria is totally non-porous, making cleanup easy and preventing food and moisture from penetrating its surface. Cambria is created from natural quartz. Cambria can bring warmth and richness to your home in a surface that has elegance and durability.