It is a hard substance found in the shell of sea creatures such as nacre, oysters and mussels. Due to its aesthetic and stylish appearance, it is generally used in jewelry and ornaments. Mother-of-pearl, a shining stone, is of organic origin. It is mined in all countries with sea and ocean. It can sometimes be found on land in the form of fossil remains, so it is one of the rare stones found in both land and sea. It contains many organic substances. Some parts of the stone are bright white while some are light white in color.