To become a jeweler you need to spend approximately 2 years in a college and to practice during all your life. The same situation is with being a tattoo artist. To make this kind of body decorations with clear lines, shadows and blackouts you need to spend a lot of hours practicing. Like a goldsmith cares about the quality of the jewels, an artist has to care about the quality of a tattoo: for how many years it will stay attractive. So find a professional artist for your body jewel, it will make you happy with your tattoo as much as your golden ring.