An empty jewelry box is knocked over on a table. chemical treatment.

On crime scenes, investigators usually look for items which had been handled from which finger prints can be taken in order to solve crime mysteries. 
In the case given in the question, the empty jewelry box must have been knocked down by someone, which means there is a possibility of it having finger print on it.
The chemical treatment that will be applied in this case is fingerprint powders, such as black granular. Application of finger print powder will reveal if there are finger prints on the jewelry box. And if there is, the pictures of the finger prints can be taken.