I do mine in a relatively sunny window in the afternoon. I have two bits of foam-core taped together at right angles and one bit underneath for the jewellery to sit on. (Does that make sense?) and then I snap away. After that I play with the piccies in Corel Photo Shop, although we've just got Adobe photo shop so I'll probably switch to that soon. This is in not-so-sunny Wales so I guess the conditions where you are will be fairly similar!
Charlie.