Luxury Blue Sapphire Ring by Graff

Generate a hyper-realistic image of a luxurious ring featuring a large, cushion-cut blue sapphire as its centerpiece, set in a platinum or white gold band adorned with smaller diamonds on the sides, worn by a woman with fair skin and dark hair, with a focus on the ring and the woman's hand, capturing the intricate details of the jewelry and the subtle nuances of the skin texture, in a style reminiscent of high-end jewelry advertisements, with soft, natural lighting and a blurred background that emphasizes the ring's beauty and craftsmanship, and includes the text 'GRAFF' in a elegant, serif font at the bottom of the image.