More info :- http://www.bellojewelsonline.com/colombian-emerald-loose-gemstones-s/1824.htm
Emerald is green Beryl and is a beautiful stone, popularly used in jewellery. The best emeralds are found in Colombia, Bolivia, India, Pakistan and Brazil. But the best stones are found in a place in Colombia near Chivor. Here, the stones are found in veins inside limestone and dark shale. Ural Mountains are also rich in emeralds and retain the most of the stones in world market.