I have a small book titled "Pocket Ref" by Thomas Glover that has a lot of useful information.I have seen it at a number of local bookstores as well as an ACE Hardware store.
Dry gravel from 1/4 to 2 inch is listed at 2835 lbs/cu yard. If wet, the weigth goesto 3375 lbs/cu yard.
Stone dust is not specifically listed, but several pulverized minerals are listed with weigths from1890 (gypsum) to 2349 (limestone) lbs/cu yard.
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