The Khaydarin Crystal is a radiant, elongated prism with sharp, geometric facets that catch and refract light, emitting a soft, blue-violet glow. Its surface is smooth and glass-like, with intricate, faintly glowing runes etched into its core, suggesting ancient Protoss technology. The crystal's structure is symmetrical, tapering to a pointed end, and it appears to float slightly when inactive, surrounded by a subtle energy field.