Dark green jade river pebble from the Uyghur Autonomous Region in China, famous for its fine quality nephrite. This dark green material is called Manasi jade after the Manasi region in Xinjiang where it is said to be found. The pebble entered the collection from Shanghai in 2017. Length 4.1 cm. Width 2.5 cm. Depth 1.3 cm. Weight 23 grams.