EMERALD

Emerald refers to green beryl,Emeralds in antiquity were mined by the egyptian and in austria, as well as swat in northern  pakistan A rare type of emerald known as a trapiche emerald is occasionally found in the mines of colombia. Fine emeralds are found in such countries, such as zambia, brazil, , madagascar, pakistan,india, afghanistan and russia. In the US, emeralds can be found in hiddenite. north calofornia In 1998, emeralds were discovered in the yokan. Emerald is a rare and valuable gemstone and, as such, it has provided the incentive for developing synthetic emeralds. Both hydrothermal and flux-growth synthetics have been produced. The first commercially successful emerald synthesis process was that of Carroll Chatham.The other large producer of flux emeralds was Pierre Gilson Sr., which has been on the market since 1964.