Emerald is a variety of the mineral beryl colored green by trace amounts of chromium. Emerald has a hardness of 7.5 on the Mohs scale. Mostly emeralds are highly included, so their toughness is classified as generally poor. Benefits of Emeralds -It can give a huge edge to the communication skills. -It is a gemstone that can help with speech difficulties, respiratory troubles, allergies and nervous disorders. -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.