The camera I use is an Olympus Stylus-90000. It is at least 5 years old. It is a point and shoot type camera, but with some changable functions.
I do use a light box that I purchased. Here are some photos of it. Keep in mind that I keep it in a storage closet!
Notice that in the photos there is a tripod for my camera. I tend to shake and move the camera about when I take photos without my tripod! I don't think that the brand of light box nor lights make that much of a difference. I feel that one must use the settings on the camera to take better photos.
The settings I use on my camera are WB (white balance), macro, and +/-. I set my WB to the sun symbol for bright light. I use the macro "on" setting (flower symbol)...sometimes I even use the super macro setting. These help, but I have found that the +/- (I think its called the aperature.) is the most imortant. On my camera I can display a bar graph of the lighting and I know to keep the red next to the right side of the graph. I take several photos at the +/- on 0.0 then move up to +0.3, +0.7, and/or +1.0. I download the photos to my computer and choose the best looking one as the one I save. If I happen to use a black background, I tend to move the +/- into the negative numbers and do the same thing.
I know that a lot of people use a photo editing program on the computer to enhance their photos. I saved my Microsoft Office Picture Manager from 2003 and still use it if I need to crop or brighten. I like that I can change the light, medium, and dark areas with this program. Plus it is easy to use!
These are the things I do to take photos of my jewelry. I hope it will help some others out there! Remember I am not a photographer and all my learnings have occurred from trial and error! And a lot of errors!!!