Chinese Yunzi stones from the Province Yunnan. These Go stones are made of pressed stone, the exact consistence is a secret.
Mostly these art of stones are flat on one side, we offer them here in bi-convex form.
Measure: 21,5 x 9 mm
Note: Black go stones are usually matte and can be easily scratched during transportation. Therefore, they are lightly oiled or powdered during manufacture to protect them against such damage. Cleaning the stones with water or a damp cloth can easily remove the oil film or powder. Sharp cleaning agents should not be used (esp. for slate stones).