Envision a mystical crystal nail design that captures the essence of shimmering gemstones. The nails should mimic the enchanting iridescence found in rare crystals, with hues transitioning seamlessly from ethereal lilac to deep amethyst. Incorporate elements of transparent layering to create a 3D effect, as if the crystals are embedded within. Add a touch of fine holographic glitter to reflect light in a mesmerizing dance with every movement. Finish with a glossy top coat to amplify the design's stunning reflective qualities.