3.1.1 Natural Sand — Fine aggregate resulting from the natural disintegration of rock and which has been deposited by streams or glacial agencies. This may also be called as uncrushed sand. 3.1.2 Crushed Sand 220.127.116.11 Crushed stone sand — Fine aggregate produced by crushing hard stone. 18.104.22.168 Crushed gravel sand — Fine aggregate.Jun 14, 2017 2. 3 8 screenings fine-to-dust crushed limestone (really fine, finest) Cheapest Crushed rock with sharp edges They get it from Austin White Lime 3. 3 8 F-rock washed limestone gravel Crushed rock with sharp edges They get it from Texas Crushed Stone (this is the only pea gravel they have) 4. Mix of sand 3 8 river rock pea gravel mix.