A green and pink tourmaline figure of Guanyin, 19th-20th century. Photo Christie's Image Ltd 2014.

The bodhisattva is carved seated on a lotus base with her hands held together to the front. She is clothed in long flowing robes, with a headdress draped over her shoulders, and a calm expression on her face. The stone ranges from a vibrant pink tone to dark brownish-black, and rich green tones. 3 ¼ in. (8.2 cm.) high. Estimate £6,000 – £8,000 ($10,086 - $13,448)

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