Polished Shell Appraisal

Polished Pearl Nautilus Shell

This item is a natural Chambered Nautilus (Nautilus pompilius) shell that has been professionally processed to remove the matte outer periostracum and the striped brown layer, revealing the underlying iridescent nacreous (mother-of-pearl) surface. The shell exhibits a classic logarithmic spiral form, known as a 'golden spiral,' with a smooth, glossy texture and a creamy white to silvery-pearl coloration. Subtle pastel hues of pink, green, and blue are visible across the surface when shifted under light, characteristic of high-quality nacre. Centrally, the umbilicus is visible where the spiral originates. The construction is exceptionally lightweight but structurally strong due to the internal septa. Regarding condition, the shell appears well-preserved with no major fractures or chips visible on the smooth outer curvature, though the delicate lip edge shows minor thinning typical of handled specimens. There are no discernible maker's marks as it is a natural biological specimen, likely prepared for the decorative arts market in the late 20th to early 21st century. The craftsmanship is evident in the uniform polishing, which reaches deep into the curves of the shell without burning or over-thinning the calcium carbonate structure. Such pieces are frequently used as coastal-inspired mantle decor or scientific curiosities.