Traditional Culture Encyclopedia - Photography and portraiture - How was this necklace taken?

How was this necklace taken?

Buy a mini camera. Plus an invisible hanger.

Depends on what kind of camera you are. If it's a SLR. Just buy two flashlights about180W.

If it is an ordinary digital camera. Just buy about two constant lights.

These are all sold by Taobao. Even if you rarely do ps, you can shoot this effect.