The paving stones that are used traditionally in constructing the drives, walkways and patios are York stone that is cut with the quarries in York- slate, granite and sandstone. The increasingly available imported stones from Chinas, India`s and Brazils market are adding intriguing and stunning colors and patterns to the true, but still famous native stones. As the cost of paving these stones is easy enough like that of aggregate and concrete paving slabs, their paving is affordable. For homeowners, laying patio of stonework is now a popular weekend project of do-it-yourself. To work with slabs and natural stone flags are much more challenging then the patios made from concrete paving. The rough edges and the irregular thickness of the natural stones makes it difficult to lay them as we don`t find them with already set spacer bars, or with the symmetrical pattern that are pre- stamped.