钻石戒指近景虚焦光斑

生成一张 4:5 竖版「钻石戒指近景虚焦光斑」案例图，所属分类为「产品摄影」。铂金钻石单粒戒指立于黑曜石面，微距拍摄，宝石内部彩虹火焰，六边形虚焦光斑飘浮。画面需要完整呈现上述主体、构图、配色、材质、光线和整体风格；可见文字以自然简体中文为主，必要的技术缩写、代码、变量名、学术符号、单位、拉丁物种名或装饰性外文可保留。

A close-up macro jewelry photograph of a solitaire diamond engagement ring balanced on its band on a polished obsidian surface. Shot with a 105mm macro lens at f/1.8; the table facet of the central round brilliant diamond is tack-sharp while the shoulders of the band dissolve into creamy bokeh. Studio lighting uses two small LED fresnel spotlights aimed at precise angles to create internal fire and brilliance: scintillating flares of blue, pink, and gold refract inside the stone. The ring band is platinum with a milgrain edge detail. Background bokeh consists of several out-of-focus catch-lights creating hexagonal aperture shapes that float ethereally. The obsidian surface reflects the ring with a deep mirror-like quality. Color palette: platinum silver, obsidian black, prismatic rainbow fire. Mood: romantic, precious, timeless.