Snuff bottle with gourd on a trellis; Qing dynasty (1644-1911); 18th-19th century; China; Chalcedony; H. 2 7/8 in. (7.3 cm); W. 2 1/4 in. (5.7 cm); D. 1 1/4 in. (3.2 cm); Snuff Bottles; The ingenious use of inclusions of different colors or even otherwise flaws in the stone is a technique known as "smart colors;" which can produce unexpected spectacles in the hands of experienced carving masters