Macro studio photography of [PRODUCT] lying flat on its side on a polished black glass surface, low-angle front view parallel to the surface, centered layout, 4:5 aspect ratio, smooth dark-to-charcoal gradient backdrop, no props, gentle key light from front-left with delicate fill light, crisp metal highlights, lifelike gemstone refraction, crisp mirror reflection, precise contact shadow, zero distortion, ultra-polished high-contrast high-luxury aesthetic, 4K resolution, no hands, no dust, no tilt, strictly horizontal orientation