Luxury skincare product presentation featuring a translucent frosted glass serum dropper bottle. The bottle is perfectly centered, resting softly on an organic, smoothly sculpted piece of pale pink travertine stone. Iridescent liquid inside the bottle catches delicate, pearlescent studio highlights. At the base of the stone, scattered delicate water ripples and a single floating cherry blossom petal create a sense of pure hydration. Rendered in Unreal Engine 5 with ray-traced reflections, hyper-realistic macro material details of the brushed rose-gold cap and the porous natural stone. Clean, monochromatic soft-pink studio environment with subtle depth of field. High-end cosmetic campaign aesthetic, highly reusable commercial product mockup. No text. 9:16 vertical format, photorealistic 3D render, 8K.