Pearl or Moti is a Gemstone that is ruled by the Moon, cold in nature and is considered to be a strong Gemstone in remedy for negative effects of Moon. It is found in White, Rose, Yellow, and Black. White has major astrological values. It is said to help in getting peace of mind by giving stableness and by eliminating unnecessary worries and anger. It is an Opaque Gemstone. Wearing Day: Monday, in the morning after bath. Cautions: One should remove and get a new one if the Gemstone gets cracked. In case gemstone doesn't suit you, Consult your astrologer. You should not wear Blue Sapphire, Hessonite (Gomedh) & Diamond along with Pearl (Moti) unless a learned astrologer recommends so!