This is a professional Yunzi go game set. Yunzi is the best go stone in China. You will have heavy, comfortable feel when you carry it, not because of its excellent quality but also it absorbs moisture from your finger.Yunzi stone has a history of about a thousand years originated in Yunnan Province in southern China. Hold up a genuine Yunzi stone up toward the light, you will see a greenish halo form around the edge, This is a unique characteristic of Yunzi.Play with Yunzi stones , you'll have a completely different experience than playing with glass, ceramic or plastic pieces.
*The stones are single side convex* Stones size: about 3/4'''' in diameter Each bowl measures Diameter 6" x H 4"