A black 'Lingbi' rock. Qing dynasty. Photo Sotheby's

a black 'Lingbi' limestone with perforations and white striations, with a clear metallic resonance, oriented three possible ways on three different hongmu stands; 14.3 by 33.5 cm., 5 5/8 by 13 1/4 in. Estimate 400,000-600,000 HKD. Lot 3247 vendu: 500,000 HKD

Sotheby's. Fine Chinese Ceramics & Works of Art. Hong Kong | 04 avr. 2012 www.sothebys.com