I said experience.
I don't know how big your theme is. First, search for the pictures you need. The more search engines, the better. Then learn from other people's perspectives, lighting, data and so on. Find what you want and copy it directly.
I personally recommend Budweiser for the lens. This lens is very easy to use at macro, and this small piece of depth of field is very suitable for taking watches, necklaces and earrings. If it is large, such as cabbage, you can use 50mm fixed focus or 17-40, the depth of field is shallow, and you can see more details of jade.
White light or light blue light is recommended for jewelry polishing, and fluorescent tubes of that color can be used. For example, a pearl necklace, tilted at 45 degrees is good. Jade can be tilted with white light or yellow light to make it look warmer, or it can be backlit. Although it is troublesome to adjust the aperture shutter in the early stage, the outer ring of jadeite is translucent and the quality of taking pictures is very high.
If the equipment is well prepared, you can highlight the theme with a dark corner ring flash, but after a few flashes, there is no electricity, and you need a socket charger and the like, and if you are not used to it, you will find the light box more troublesome.
For jewelry, it is not recommended to use eight-feather spinning coke, which can not highlight the theme and looks too dizzy, but my sister's sugar water tablets are good.
Finally, let me say a few words. If it's such a small thing as rings and earrings, I suggest you take a picture together. As far as the ring is concerned, there are exquisite arrangements, such as one vertical and one horizontal, so that people can know the position and structure of the ring and the jewelry on it at the same time. This is clear at a glance