1, use soft light to avoid direct glare, just cover the glare with sulfuric acid paper, and if one layer is not good, it will be multi-layered;

2. Shoot transparent jewelry with transmitted light and still life, fill light at the bottom, shoot with backlight, shoot opaque jewelry with ordinary light, fill light in the dark appropriately, and use reflector.

Secondly, with the help of a polarizer?

You can add a polarizer to reflect light, and you need to choose a better polarizer. You can learn more about this in Baidu. Diamond shooting can also use starlight mirror, Baidu. A few words are unclear.

As for metal reflection, it seems that polarizer can't solve the problem of reflection.