some good natural light to show your work off at its best. While lamps and artificial light can be useful, when used as the primary light source at home they can make big reflections on gemstones and metal often in a yellow tone. Artificial light will also give silver a yellow hue.
It is all about the angle
When photographing your jewellery, remember that people will want to see it from different angles so they can understand what shape it is, what sort of clasp it has or what size the gemstone is among other things. It can also be useful to have close ups of details such as charms or particular texture you have used.
Angle is also important when photographing gemstones as the slightest movement can mean that you pick up the colour of the flash better or that the facets show up much better. It is best to take several photographs with slight changes in the angle so you can pick the best. Through practise you will also get an understanding of which angle works best.