Two different kinds of jade— jadeite, and nephrite. Everyone knew that nephrite is the more common type of jade that had been mined in the country for years now. nephrite's colors vary from white and gray and some variations such as dark green, brown, and black. However, the most common nephrite color is white. On the other hand, jadeite had more variety of colors. While the most common color of jadeite was pale green, this type of jade could come in the color green, lavender, yellow, black, and white.
All these were common knowledge when it comes to playing this type of game.