Bamboo-leaf Pattern 竹叶石 from China - VSANA. These ancient marine sediments composed of carbonate rock are found in Jiangsu, Shandong, and Liaoning provinces. Some stones display bamboo canes and branches as well as leaves. They are found in various colors including white, yellow, dark reddish-brown, and black. Stones with clear leaf-like patterns are highly sought after. This stone type is easy to recognize because of its distinctive surface pattern.