Full side profile of a woman in an avant-garde transparent crystalline helmet. **Back of the head:** A series of sharp, polyhedral crystal spikes neatly arranged in a radial crest at the occipital area. **Neck:** A high, closed collar made of regular vertical crystalline prisms. **Visor:** Sharp, aerodynamic streamlined face shield with clean geometric cuts at nose and chin. **Optics:** Intense prismatic refraction and rainbow caustics dispersed across the ENTIRE helmet surface, not just eyes. Light scattering through complex facets, chromatic aberration, high-gloss finish. Wearing black micro-pleated garment. Minimalist white background, studio lighting, hyper-realistic, 8k resolution.