A rhinoceros horn 'Pine' cup, Qing dynasty, 18th century. Photo Sotheby's

the tapered horn of reddish-brown colour lightening to a caramel tone at the flared rim, naturalistically carved to resemble a section of a tree trunk with blossoming pine twigs entwining around it and extending in openwork onto the interior to form the handle on one side, the organic bark accentuated with irregular and uneven lenticels; 14.5 cm., 5 5/8 in. Estimate 120,000 — 180,000 HKD

Sotheby's. Fine Chinese Ceramics and Works of Art. Hong Kong | 08 Apr 2014 - www.sothebys.com