Eggshell Material is a durable, machinable, and fully compostable bio-based material (84% waste eggshells, 16% natural binders) for designers, manufacturers, and product developers. It solves the need for low-impact industrial materials by diverting food waste from landfill via low-energy, non-toxic production. After use, it decomposes naturally into calcium-rich fertilizer, supporting a circular model. The material is proposed as a patentable solution.