Large greyish green jade river pebble with a brownish black spot which was partly chipped off but became smoothed by tumbling in the river. It originates from the Uyghur Autonomous Region in China, famous for its fine quality nephrite. The pebble entered the collection from Shanghai in 2017. Length 5.7 cm. Width 4.7 cm. Depth 2.3 cm. Weight 82.7 grams.