Photorealistic portrait of a sleek black cat with bright blue eyes lying elegantly on luxurious shiny blue satin pillows and bedding. The cat wears a large sparkling diamond-encrusted bib necklace and a matching diamond bracelet on one paw. Scattered diamonds and rhinestones glisten on the fabric around it. Dramatic dark background with cool blue lighting and sparkling reflections, ultra-detailed fur texture, diamond sparkle, and satin sheen, luxurious and glamorous, 8k photorealistic