Aurora Terrain in an Abalone Shell

An abstract macro photograph of the inside of a real abalone shell, cropped so no shell outline is visible. Broad nacre ridges sweep from lower left into a dark upper-right trough, showing natural cyan, lilac and soft rose iridescence that changes along the growth layers. A few tiny mineral pits preserve biological realism. One large soft light produces long pearl highlights without blown whites or glitter. Topographic composition, restrained cool palette with warm pink fractures, deep tactile relief, museum specimen quality, no jewels, no text, no painted rainbow gradient.