thinbuddha
I prefer the inclusions of a natural crystal ball, though it is obviously not necessary for everyone. For me, it is much like watching the clouds change shape (and believe it or not, the inclusions *do* appear to move when I am scrying). It is simply amazing- it is a bit like a dream in that I can't really interpret anything based on the shapes I see, but it is wonderful and meditative all the same when I can do it. My best luck has been late at night with only small amounts of light. I haven't tried candlelight, but I suspect it would work well for the method that I've had success with.
-tb
-tb