Experience, training or licensing may be needed
There are many different ways of getting into the jewelry business and many different types of materials with which you can work. Working in metal will probably require the most in the way of specific tools. You need to be able to heat the metal to manipulate it, and you need metalworking tools to cut and engrave it. But there are many other materials that you can work with to make jewelry–glass, plastic, beads, feathers, even wood, to name just a few.