Luxury Jewelry Macro Diamond Ad Prompt

Create a high-end commercial jewelry macro photograph, vertical 4:5, of a delicate radiant-cut diamond piece with no brand name attached. Capture the diamond in extreme macro: precise sparkle, crisp facet reflections, and light dancing across every cut, with the metal setting rendered in flawless detail. Style the shot like a flagship jewelry campaign — a dark, refined backdrop, controlled luxury lighting, and a composition that lets the diamond own the frame. The mood is quiet opulence: one perfect piece, photographed so well it feels priceless.