The construction industry is not dependent on the river sand completely anymore. During the recent years, several manufactured sand (M-Sand) plants have come up that crush rock boulders to sand granules. With problems in availability of river sand, use of M-Sand is on rise. This is another variant of sand, but the source is the limestone taken from the hills for the manufacture of cement. Cement factories need pure limestone for the manufacture of cement. Limestone sourced from the hills generally has 40 percent to 50 percent impurity. It is crushed to less than 600 granules and processed using water and chemicals (froth floatation process). The by-product can be used as an alternative to or blended with the river sand or M-Sand.