Prismatic Glass Icons

Imagine: produce a high-resolution illustration of a [skull] icon in the style of a glossy, translucent sculpture. No shadows, textures, or extra elements. Center the icon on a solid black background. The icon should appear as if made of curved, flowing glass featuring reflective surfaces. Infuse the form with vivid, refracted rainbow gradients that shift smoothly across its contours. The shape should be abstract yet recognizable, with a sleek, high-gloss finish and diffused reflections that mimic light bending through clear material. Square aspect ratio. Tip: add a tiny scale reference (a coin, a pencil) to anchor object size perception.