Good tutorials on creating wonderful texture and color. Yours Artfully: Liquid Leaf Luciousness In More Detail. Not sure why anyone would put this much work into a gift tag, but it would be the start to great art work.
ARTFINDER: Iridescent magnets by Nestor Toro - Translucent effects, fast color shifts and many angles. For this piece I carefully placed layers of metallic painting creating a lot of depth and iridescence.