Cast stone produces a strong and durable product that will weather naturally in an outdoor environment. Simply stated, cast stone is chosen for its beauty and authenticity. Our material is natural, authentic, made in the USA, and 100% recyclable.  All cast stone products will age naturally with exposure to the elements. Efflorescence, the leaching of salts from the raw materials to the surface of the piece, may occur, resulting in a powdery white residue that will eventually wash away. This process will only occur once.