Emerald is a green variety of the mineral beryl and is considered one of the precious gems. It is highly prized for its rich green color and is often used in jewelry. The best emeralds stone come from Colombia, but it can also be found in Zambia, Brazil, and other countries. Emeralds are typically included, which means they contain internal characteristics known as "inclusions." The presence of these inclusions is normal and does not detract from the value of the stone.