A wide variety of water-tumbled stones come from the Jinsha River. The Jinsha is the upper course of the Yangtze River and runs roughly 2,300 km or 1,423 miles through some steep gorges in Qinghai, Sichuan, and Yunnan provinces. This is a fast-flowing water course that results in many water, sand, and gravel-shaped stones. Stones from the lower Jinsha cannot be distinguished from those removed from the upper Yangtze River.