What's the use of putting mercury in dice?

Increase the weight of the dice. According to Douban's inquiry. Com, the principle of injecting mercury into dice is like a tumbler. When in use, the center of gravity needs to be fixed artificially. Once the center of gravity is fixed, no matter how the dice rotate, the fixed side of the dice always faces upward, so mercury is added to the dice to increase the weight of the dice.