Small dark yellowish green river pebble from the Uyghur Autonomous Region in China, famous for its fine quality nephrite. The pebble has some brownisch clouding inside. Hetian lies in the Uyghur Autonomous Region in China, famous for its fine quality nephrite. Length 3.4 cm. Width 2.2 cm. Depth 1.3 cm. Weight 12.5 grams.