Indonesian Stone Fossilized Shell

Picture a loosely wound ribbon of pale coil with a neat little eye at the middle.

This fossilized shell from Sulawesi is from Sulawesi, Indonesia. It is stone. Fossil shells are typically made of calcite or silica that has taken the place of the original shell, which makes them hard and stone-like. Plainly, a flat spiral formed of a rolled band turns tightly around a central dimple, with a tan surface speckled with brown. The outer turn flares away at the top and the underside looks rough and unfinished. It is 5.5 inches wide, 5.5 deep and 7.5 high.

Charmingly lopsided and quite sure that it is round.