Beryl is considered to be one of the most important gem minerals, even if its name is not so popular among the general public. In its pure form this gemstone is colorless but what make it special are the impurities that give beryl a varied coloration. The green variety is known as Emerald, the blue variety Aquamarine, the greenish-yellow is named Heliodor and the pink variety is called Morganite. Emerald is one of the most valuable and known gemstones and is highly prized. For example a 1carat emerald might cost $1000-$2000, while a 3 carat emerald can be as much as $8000.