A pink and green tourmaline 'Ruyi and sharon fruit' carving, 19th century. Photo Christie's Image Ltd 2014.

The green part of the stone is carved in the shape of three sharon fruits, with a ruyi and tassel resting on top, delicately highlighted in the pink area. The stone is of pale green and pink tones with some small areas of cloudy inclusions. 1 ¼ in. (3.2 cm.) wide. Estimate £4,000 – £6,000 ($6,724 - $10,086)

Christie's. FINE CHINESE CERAMICS AND WORKS OF ART, 13 May 2014, London, King Street - http://www.christies.com/