Stone masonry has been around for millennia, and it has developed into a variety of forms. The simplest is nothing more than piling rocks together to form walls or rough buildings. No mortar is used to hold the rocks together, and they are uncut from their original shape. This is fine for a rough wall around a field, but it is not necessarily the best way to build a house. Stone masons are the people who build these walls, and they have refined their techniques throughout the centuries.
Modern stone walls and buildings use many different techniques, and many of them were developed to create smooth surfaces or stronger buildings. Creating walls of stone takes a great deal of time, so slip-masonry was invented to build strong walls faster. Smooth walls require that the stones be cut, and the type of finishing determines if all or only some of the sides of stone will be changed to fit the façade of a building.