Yunzi Double Convex Stones - 9.2mm (Size 33)

Yunzi stones have been made for almost a thousand years in the same area of Yunnan Province in southern China. The secret recipe for making them is closely guarded, and nobody outside of Yunnan knows with complete certainty what they're made of. Although rumor has it that the ingredients include Yunnan mountain stone mixed with agate. To make sure that stones are genuine, hold them up to the light to see a greenish halo form around the edge. This is a unique characteristic of Yunzi stones. They have a balance and a deeply rich color that are instantly noticeable. They leave an audible "snap" as you place them on the board. The texture, symmetry, and precision of these stones are superior.