Chinese Black Basalt Paving Stones Tile

This black basalt is from China, Basalt belongs to basic volcanic rocks. It is the most important component of the Earth's oceanic crust and lunar sea, as well as an important component of the Earth's continental crust and lunar land. Basalt is a basic volcanic rock [1], and its chemical composition is similar to that of gabbro. The main components of basalt are silicon dioxide, aluminum trioxide, iron oxide, calcium oxide, magnesium oxide (with a small amount of potassium oxide and sodium oxide), with the highest content of silicon dioxide, accounting for about 45 to 50%. The color of basalt is commonly black, dark brown, or dark green. Due to its dense texture, its specific gravity is heavier than that of ordinary granite, limestone, sandstone, and shale. However, some basalts have a particularly large number of pores, which reduces their weight and even allows them to float in water. Therefore, this porous lightweight basalt is called "pumice".