Lot 3247. A black 'Lingbi' rock, Qing dynasty. Estimate 400,000 — 600,000 HKD. Lot sold 500,000 HKD. 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.

Sotheby's. Fine Chinese Ceramics & Works of Art, Hong Kong, 04 Apr 2012