I competed as a jumper for a Div. I university and when we refurbished our indoor and outdoor pits we utilized a caribbean white sand much the same as used at international venues. To my recollection I don't believe this to be extremely expensive while it limits dust when dry (during practice sessions) and marks great when wet (during competition or high intensity practices).
Isn't it funny how every single aspect of track and field has experienced change since the inception of modern T&F? From the shoes, to the running surface, to the jumping mats, everything has changed except what we jump into for long jump. You'd think they would have come up with something better by now.