Abalone Shell (Mother of Pearl) Pendant, Large. Source: North American west coast. Calcium Carbonate: CaCO3 Abalone is a type of mollusk. The shell of Abalone is highly durable. Microscopic calcium carbonate builds up like bricks and is stuck together by protein layers. Abalone exhibits a play of bright blues, browns, blacks, and turquoises on a polished surface. Abalone is very useful when it comes to stimulating your psychic development. It will enhance your intuition and other psychic gifts. It can also increase your ability to be more emotionally open and expressive.