A luxurious studio portrait of a woman wearing an elegant emerald and diamond necklace, captured from the shoulders up. The model has smooth skin, soft natural lighting highlights the jewelry’s brilliance, and the background is a subtle gradient. The necklace features alternating emerald and diamond stones with a teardrop emerald pendant at the center. The model wears a simple black satin dress with thin straps, emphasizing the necklace. Focus on high detail, sharp jewelry reflections, professional fashion lighting, and a premium jewelry catalog aesthetic.”