Luxury Diamond Ring in Calla Lily

Generate a hyper-realistic image of a diamond ring nestled within the dark red, velvety petals of a calla lily flower, set against a gradient gray background that subtly darkens towards the edges, creating a moody and intimate atmosphere; the ring features a large, round brilliant-cut diamond held in place by four prongs on a polished silver or white gold band, with the flower's elegant, trumpet-shaped bloom curving around it in a protective and symbolic gesture; the overall composition is centered, with the flower's stem extending downwards out of frame, and the lighting is soft yet dramatic, highlighting the textures of both the flower and the jewelry, as well as the sparkle of the diamond; the image should convey a sense of luxury, elegance, and romance, suitable for high-end jewelry advertising or editorial content.