Mother of pearl has been known for centuries for its powerful purifying and uplifting effect. So the power of the shell, is in the mother of pearl.
That is why this type of shells is often used for burning white sage and thus purifying someone's aura or living space. If you use the shell for this purpose, put some sand in it to prevent it from getting too hot.
This shell is also a beauty for safekeeping your jewellery or any other precious objects.