Seawater pearls will show different optical effects under the flashlight. Seawater pearls will show distinctive colors under the illumination of light, such as common pink, silver and white, while fake seawater pearls are white under the illumination of flashlight. The identification of seawater pearls needs to be combined with other characteristics, including luster, shape, size, defects and so on. If you have any questions or need further help, please consult a professional jewelry appraisal institution or professionals.