Location: Minneapolis/St. Paul, Minnesota - Latitude 45.057 Longitude -93.074
What is "compactable gravel" ?
Gravel is a generic name that varies in properties depending on the location.
Ideally, if you want a compactible gravel should generally be angular and contain some clean fines (not too much clay or silt) that allow everything to interlock and and not collect large amounts of water.
It makes no difference whether it comes from "bluestone", granite, crushed river rock/boulders or limestone.