Перламутровая раковина — вариант 2

Use case: product-mockup. Use the supplied image as the exact reference. Create one isolated transparent PNG of the same nacreous spiral seashell, with a pointed coiled spire, ridged spiral body, and broad flared aperture. Explicit palette: glossy ivory, pearl white, pale peach and subtle warm coral details, with luminous nacre sheen. Pose/angle: diagonal resting pose, spire toward upper left, aperture turned to the right and slightly toward camera, three-quarter view. Framing: medium close-up product photograph, whole shell centered in square frame with transparent padding, no crop. Keep realistic raised ribs, pearly material and soft diffuse upper-left lighting. Make a noticeably different but plausible shape sibling: a somewhat shorter, broader spiral body and a more widely flared scalloped opening, retaining the pointed spire and same seashell identity. Genuine transparent alpha outside and through the aperture; no scene, sand, water, display surface, shadow, text or other objects.