Emerald is widely known as precious gemstone having distinctive green colour. It is one of the mineral Beryl variety OF Beryl family (Be3Al2(SiO3)6). The green colour is due to the presence of chromium and Vandaium. At Mohun Scale, the hardness of beryl is 7.5-8. The quantity of emerald around the world is traced in a small amount. They are found in ingenous, sedimentary and metamorphic rocks.