An agate mountain, Qing dynasty. Photo Sotheby's.

modelled in the form of an irregular jagged mountain, the stone of an opaque greyish tone suffused with golden-yellow inclusions, wood stand. Quantité: 2; 12cm., 4 3/4 in. Estimation 4,000 - 6,000 GBP

Sotheby's. Fine Chinese Ceramics & Works of Art. London | 06 nov. 2013 -http://www.sothebys.com/