Mother of Pearl. (Nacre) Aragonite ( Calcium Carbonate): CaCO3 Mohs: 2-3. Source: California, New Zealand, Worldwide. Mother of Pearl forms mainly the insides of oysters and other shells. A magical gift said to contain the energies of the 'God of the sea'. Worn to protect, reduce fear and bring calm. Especially good for those with a hectic lifestyle. Stimulates imagination, intuition, and sensitivity. It enhances your endeavors and mental clarity during decision making. Promotes co-operation and adaptability. Stimulates fertility of body and mind. Good for bones, hearing, nervous system, spinal canal and the uptake of vitamins A and D.