Gradation of stone and rock is found by ASTM C136 the Test Method for Sieve Analysis of Fine and Coarse Aggregates Gage numbers are used to identify aggregate ASTM No 57 aggregate is found using a 1 5 inch sieve through which all of the stones will pass No ASTM 57 aggregate stone is smaller than a No 8 seize with a 0 0937 inch sieve