A macro cinematic video of a ring worn on a human finger. The gemstone is the main subject and must remain 100% identical throughout the video — no deformation, no change in shape, structure, texture, color, reflections, or proportions. The stone slowly rotates on the finger, revealing both the front and the back sides of the gemstone in a smooth, continuous motion. The rotation is natural and physically accurate, as if gently turned by an invisible force. CRITICAL: The gemstone must stay perfectly consistent in identity — same cut, same surface details, same inclusions, same reflections. No morphing, no regeneration, no reinterpretation. Ultra-realistic macro lens (100mm), extremely sharp focus, shallow depth of field. Cinematic lighting with soft highlights and realistic reflections on the stone surface. Skin texture of the finger is natural and detailed. Camera remains steady with slight micro-movements (handheld realism). Background is softly blurred (bokeh), neutral and non-distracting. Lighting setup: studio-quality, soft diffused key light + subtle rim light to enhance the edges of the stone. Resolution: 4K–8K, HDR, high dynamic range, ultra-clean image, no noise, no blur. Style: luxury jewelry commercial, photorealistic, cinematic, high-end product showcase. Motion: slow rotation (5–10 seconds), smooth and elegant.