Mukta or pearl is the most valued of the organic gems.  A pearl is a very special and exclusive gift of nature considered universally as the oldest known gem.  The most valued come from the ocean and have a visible lustre or sheen with the most common being white or cream with a rose overtone.
Mukta or pearl represents the queen in Jyotish.  The pearl is often called the "queen of the sea".  The pearl harmonizes Chandra, the moon which directly influences emotions, mind, affluence, and public.  Wearing a pearl can bring harmony and stability to these influences.  Chandra influences the seasonal, monthly and daily cycles and rhythms in the physiology and our emotions.  Chandra, the moon, occupies a central role in the solar system and in our physiology.  This influence is represented by the hypothalmus in our physiology which controls our behavior, our emotions, our hormonal and reproductive cycles and our body temperature.  It nourishes the physiology like a mother or queen and occupies a central place in the centre of the brain with the thalmus.