Pearl (Moti) The Pearl is a gemstone for the Moon. The Moon has the authority on this gemstone. The Pearl is worn to make the Moon strong in our horoscope. When a person wears a Pearl, his mental strength increases, he gets the concentration and mental peace. The stability is restored in our mind. He can get the benefit in the mental depression, anxiety and all types of mental problems. If a person wears a Pearl, he gets the benefits in the problem of cold related diseases, asthma, lung diseases, headaches, migraine, anxiety etc. The Pearl is a very effective and beneficial gemstone for the persons, suffering from mental illnesses.