Dice with size 83 mm

unknown, 2 sides. Size 83 mm, wood.
This is a pair of Shen Bei, a Chinese divining item. To use them, pose a question and state an answer. Then throw the Shen Bei. If they land with different sides up (one curved, one flat), the answer is affirmative. However, for a positive divination, three consecutive affirmatives are needed. ... Read More Read Less