Gemstone Emerald associated to planet Mercury, Mercury always resides along with Sun or at minimum one house ahead or behind the planet Sun. This planet representing wisdom and voice. It gives mental alertness, memory, communication skills, discrimination intellect and mental control. When Mercury is weak or afflicted then mental dullness, immaturity or poor memory retention may be evident, and logical part of the mind is not functioned in a normal way. Which may cause daydreaming, anxiety, fantasies or an irrational outlook on the world. Emerald gemstone is very suitable for diplomats, scientists, businessmen, insurance officers and musicians.