Emerald is the Gem of Mercury and in Astrology Mercury represents the intellect, nervous system, finances, communication skills etc.
By wearing an Emerald the rays of the planet mercury entering the body get enhanced this improves the strength of the nervous system and the ability to think, to analyse and interpret the situations and give quick responses.
The financial position of the person improves and the accumulated liquid resources get bigger in size.
Communication skills are the key to getting success in every field of of life be it personal or professional. These skills get improved by regularly wearing a good Emerald.