How to get the facula effect by sprinkling gold powder on the background of jewelry shooting?

First of all, you should use a large aperture lens to ensure that the depth of field is shallow enough, then the gold powder should be scattered sparsely, and the gold powder should be illuminated by lights, and the background must be black light-absorbing flannel. Gold powder should be at a distance from jewelry, not too close. At this time, as long as the jewelry is focused accurately, light spots will naturally appear in the background.