Use soft, diffused light as your main lighting. A light tent or DIY shooting tent works well because jewelry—especially polished metal—reflects everything around it, and the tent helps control those reflections while giving even light from multiple sides.

For extra texture or sparkle, add one small harder light or flash near the camera, slightly above or off to one side. This can create attractive highlights and help diamonds or textured surfaces catch the light.

To keep the whole piece sharp, stop down rather than shooting wide open. Around f/8 to f/11 is a good starting point for more depth of field. Since that may require longer shutter speeds, use a tripod for maximum sharpness.

A seamless background is also helpful for a clean product look, and it can be made cheaply with DIY materials. If you want a warmer, earthy feel, keep the background simple so it doesn’t compete with the jewelry.

Lens-wise, you don’t need an ultra-fast lens; a normal lens can work, and longer focal lengths are also commonly used for product photography.