In this case, the crushed stone is obtained.

From rocks of different types, magnificent components for concrete are obtained, only rocks are rarely used in construction. As a rule, they are processed. For example, countertops (well -known granite countertops are cut out of rocks, and granite is a magmatic intrusive rock, which consists of minerals: quartz, field spar, mica and plagioclase). In order for mountain materials to be used in various mixtures for construction, they are crushed. In this case, the crushed stone is obtained. There is gravel as an alternative to crushed stone — these are the same tiny stones of different fractions, but they are formed naturally without human participation.