The concrete
Yes, Stonetile consists of real concrete. Manufactured stone typically is produced with either pumice or expanded shale. Both of these materials are light-weight and therefore quite water absorbent. We use only real crushed stone which consists of pure limestone. Why is this important? Normal concrete sand and gravels have a lot of impurities such as bits of coal, clay, organic materials and worst of all pyrite, also know as fools-gold. Pyrite will absorb water, expand and pop and an ugly rust stain will appear on the surface of the concrete. Stonetile has been produced with pure limestone aggregate for the last 12 years. Limestone does not contain the high levels of silica that normal aggregates do. It should be said that concrete is the most durable exterior materials when it comes to U.V. damage.