Marian Sturkenboom / Elisabeth Leenknegt
If you really want to see these rings, you'll have to turn off the lights. Dutch artist Marian Sturkenboom colours silicone with photochromatic that's glow-in-the-dark dye, creating ethereal work reminiscent of jellyfish. Also pictured above are shots of one piece under different lights, to give you an idea of the effect.
Below, some more of her gorgeous rings:
Even more jewellery: