The process is relatively straight forward. All concrete is placed in a wet and malleable state (often referred to as the Plastic State). This property of concrete enables it to be formed into an endless number of shapes.
Over a period of hours, the concrete ceases to be Plastic, and begins to firm and become hard (often referred to as the Hardened State).
After the concrete has fully hardened, the top few millimetres of concrete are removed in order to reveal the materials embedded within it.
This process of revealing, or exposing the stone (normally called: aggregate) is achieved by first grinding and then successively polishing the surface smooth. The resulting finish is called: Polished Aggregate Concrete.