Eggshells powder is an all-natural product made from ground eggshells. It can be used as an additive in spiritual rituals and is a natural source of calcium, helping to nourish the Cascarilla/Efua/White chalk is a natural product, made from 100% eggshells powder. It can be used in spiritual practices to protect against negative energies. Its fine white powder absorbs quickly and leaves a smooth finish on the skin. Give your spiritual practice an extra layer of protection with this powerful remedy.body naturally. Try adding it to your spiritual work today!