Emerald rough stone is a precious ore, which can be divided into five categories according to its physical characteristics and appearance characteristics. 1. Burmese jadeite: Myanmar is one of the most famous jadeite producing areas in the world, and its jadeite is famous for its dark green and high transparency. Burmese jadeite is usually bright green with uniform texture and good luster. 2. Oil-green jade: The surface of this jade has been treated with oil to enhance its color and transparency. Oil-green jadeite can be the original stone of various origins, and its appearance can be improved by oil treatment, making it look more vivid. 3. Emerald: Emerald is a kind of jade with light green or light blue tone. It usually comes from Canada, Russia and Alaska. Green jadeite is popular because of its unique color and is widely used in making jewelry and decorations. 4. Burmese jade: Compared with Burmese jade, Burmese jade is more turbid in color, often light green or white. Its hard texture is often used to carve works of art and Buddhist culture. 5. Snow jade: Snow jade is a rare jade, which is characterized by white and transparent appearance. It is unique in that it is not green like other jadeites, but has a pure white appearance.