Yorkstone flags reproduce the look and feel of the original stone found in the Yorkshire hills of England. Each paving stone has its own unique veined pattern, and hardness levels exceeding 7000 psi make it more durable than most natural stone. The color is integral throughout, and a proprietary additive is used to seal the stone from moisture. Suitable for both indoor and outdoor use, the rigors of extreme climates will only weather the stone in a natural way. Monarch Stone Inc., 800-279-2278. www.monarchstone.com