Emerald, the green variety of Beryl, is the most famous and valuable green gemstone. Its beautiful green color, combined with durability and rarity. Deep green is the most desired color in Emeralds. The wonderful green color of emerald is unparalleled in the gem kingdom. Emeralds always contain inclusions and other flaws. These flaws are not looked on as negative aspects for emerald like they would be for other gemstones. Indeed, these flaws are considered part of the character of the stone and are used to assure the buyer of a natural stone.