I like it, I really like it, the purple glow is looking really lovely and fits in really nice.
However I feel the last picture does not match the quality, that is the middle part, while I like the stone with the yellow light in the inside, I think the rest looks rather boring and not innovative, also, to underline the effect at the rock, I would stay away from adding more yellow glows away from it, as you did.
Apart from that, good job.