How is Construction Sand made and where does it come from?

Construction Sand can come from a variety of sources.  Some may be a type of natural sand, such as river sand, and others may be a type of crushed granite or limestone.  So the sources are usually determined by the local source or quarry.  It may also be determined by the bagging facility for big box retailers.  However, a good Construction Sand regardless of its source should be screened to remove large particles (gravel) and washed to remove small particles (dust).