Emerald Birthstone is Velvety green in color, The most coveted emerald is that which is radiant and smooth and has neither cracks nor dots. Emerald stone harmonizes and strengthens the positive influences of Budha or mercury. These influences include intelligence, education, speech, teaching, learning, communication, confidence, writing, drawing, trade, humor, wit, discrimination, diplomacy, intellect and commerce. Emerald gemstone helps to lift depression and insomnia and promotes knowledge of the heart resulting in peaceful dreams. Budha or Mercury is the “prince” in Jyotish and is influenced by Surya and Chandra. Budha or Mercury in the human physiology is associated with the sub-thalamic nucleus which resides in the brain and receives input from various parts of the brain which directly influences its activity. Similar to the placement of Budha or Mercury which revolves around Surya (Sun) and is directly influenced by that relationship, the sub-thalamic nucleus’ activity is influenced by the input it receives and modulates its output accordingly. Emerald saves a person from troubles, increases power of faculty, gives mental peace, pacifies the anger and increases eye sight. It keeps the body health and mind happy. It is uses to counter the ill effects of mercury.