Emerald is a Gem variety of the mineral Beryl colored green by trace amounts of Chromium and sometimes Vanadium.
Emeralds are one of the most highly valued gem due to the rarity of their deep Green color and Natural inclusions that make each one distinct. Being month May's birthstone, they are also gifted traditionally on the 55th milestone anniversary. They are commonly mined in Colombia, Zambia, Brazil etc.
Emerald enhances psychic abilities, stimulates the use of greater mental capacity by bringing awareness of the unknown to conscious recognition, imparting reason & Wisdom. It is said to strengthen memory and imparting clarity of thought.