subdermal LED necklace, glowing light beneath the skin, (embedded LEDs:1.7) forming the shape of a gold necklace under the skin, soft golden glow radiating from beneath the surface, (subdermal sapphire glow:1.6) at the center of the necklace, light shining through skin as if it were a gemstone, sapphire-like LED at the core, seamlessly integrated subdermal jewelry, high-definition, (natural skin tone:1.5), soft golden LED accents tracing the neck, glowing blue light from the center, ultra-realistic textures, natural skin with light emanating from within, elegant yet futuristic under-skin jewelry, (futuristic elegance:1.5), glowing sapphire effect from beneath the skin, high-resolution, (delicate light diffusion:1.4), modern beauty tech, advanced subdermal LED technology