Natural intelligence and intellect is the domain of Planet Mercury and enhancing this planets power brings in better understanding of life, a balanced perspective and better ability to grasp deeper subjects too. The mineral named beryl of which emerald is a variety has a chemical composition of Be3Al2 (SiO3) 6, and in pure form, it is without colour. The vibrant green colour in emerald is due to trace amounts of chromium or vanadium. Its specific gravity is 2.72 and birefringence is between 0.005 - 0.009. Emeralds symbolize a lot of things, and these meanings come from their rich roots in mythology and religion. However, most prominently, they signify companionship and loyalty. Emerald is considered to be a spring and Venus stone. It is believed to symbolize love, rebirth and fertility as well. Faithfulness & Loyalty: According to Greek mythology, emeralds depicted love and wearing them brought fidelity to the couples. Good Luck & Eternal Youth: The famous Mughal emperor and creator of the Taj Mahal, Shah Jahan, inscribed scriptures into emerald talismans for good luck. In the Vedas (the oldest Hindu scriptures), emeralds are described as the gems of good luck that are capable of improving one's wellbeing. According to Chinese culture, certain days of the week can bring good luck to those wearing emeralds. It is also believed that the mummies of ancient Egypt were preserved with an emerald beside their neck to give them eternal youth.