This is the end of a glass indoor plant waterer. It is glass, has a bulb structure at one end, where the water is, and the other end is injected into the soil of the plant thus creating an automatic watering tool. The brilliant colors are from a CD reflecting light in the background. Couldn't possibly re-create this if I wanted to. Used Kenko extension tubes with 100mm Canon Macro lens to get the magnification.
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This looks like an acrylic tube that has been cut at a 45 degree angle . . . maybe a part of a night light or other piece of decor? The light in this image is great - 7