A jewelry box itself is usually replaceable, but what is inside it often is not. Empty it into something you carry yourself before you ever wrap the box for the truck.
Pro tip: Check for a false bottom or hidden drawer, especially in older wooden jewelry boxes; these are easy to overlook and easy to forget entirely.
Watch out: An unemptied jewelry box loaded onto the truck puts its entire contents at risk if the box is misplaced, damaged, or opened by someone other than you.