Crushed stone or angular rock is a form of construction aggregate, typically produced by mining a suitable rock deposit and breaking the removed rock down to the desired size using crushers. It is distinct from gravel which is produced by natural processes of
Gravel /ˈɡrævəl/ is a loose aggregation of rock fragments. Gravel is classified by particle sizeGravel often has the meaning a mixture of different size pieces of stoneLag gravel: a surface accumulation of coarse gravel produced by the
U.S. domestic production and use of construction aggregates amounted to.billion tons of crushed stone, sand and gravel–valued at $.billion.