Cascarilla (Cascarilla Coquille d'Oeufs) powder is a fine powder of white eggshells used primarily in Afro-cuban magic to draw out sigils on the ground or for various protective purposes. It can be used to prevent possession by marking crosses in it on the back of the neck, the elbows, the base of the spine, the backs of the knees, the insides of the ankles, and the forehead. We grind our own and sift it to a fine white powder with a silky texture.