G1 Crushed Stone for base course is not the same thing as crusher-run, and it is not just a matter of density that makes the difference. G1 Crushed Stone was developed from single stage crusher-run material when during the late 1950’s some observant Engineers noticed that this material would sometimes, after a.Stone Crushing For Road Base 0q2cmssimarketing Specialty Crushed Stone 57This category refers to a stone that is about 3 4 inch long. Most typically use it for concrete mix landscaping and drainage. 67Crushed stone 67 includes stone that is 3 4 inch or smaller in size. 67 is a great material for road and slab base as well as fill.