Main materials of road and Water Conservancy project. is one of the main decorative materials of modern civil engineering. Natural stone can be roughly divided into 3 categories. Igneous rock is formed by melting or partially molten material such as magma cooled by the rocks of the mantle or crust. Granite is a kind of igneous rock, which is not too deep in the Earth's surface, the weathering products of other rocks and some volcanic eruptions, through the flow of water or glaciers, transport, deposition, diagenesis formation of rocks, And sandstone belong to this category.