Found this on the net, interested to know how accurate it might be.
Sand, wet - 1.92 tonne/cubic meter
Sand, wet, packed - 2.08 tonne/cubic meter
Sand, dry - 1.60 tonne/cubic meter
Sand, loose - 1.44 tonne/cubic meter
Sand, rammed - 1.68 tonne/cubic meter
Quartz sand - 1.2 tonne/cubic...