Create an ultra realistic 4K 1:1  studio image showing the inserted ring placed at true scale on a dark textured stone surface positioned low in the frame, photographed from a close low frontal angle using a medium focal length around 70 mm for natural proportions and shallow depth of field that keeps the ring perfectly sharp while softly blurring the background, set within a warm golden brown fabric backdrop with smooth folds that create soft gradients and a gentle sense of depth, illuminated by warm directional light from the upper left that produces controlled highlights along the metal edges and gemstone surfaces and forms soft shadows to the lower right on the stone surface, with minimal ambient fill to maintain contrast without flattening the contours, ensuring the inserted ring is rendered exactly as it exists in real life with fully accurate shape, size, proportions, colors, materials, metal finish, engravings, reflections, and all micro textures preserved without alteration, integrated naturally into the scene with correct grounding, realistic contact shadows, and precise reflective interplay with the environment for a clean premium photorealistic result.