A collection of white jade, 18th century

A fine white jade covered vase. 18th Century

Of flattened hu form with an angular profile, carved in high relief with a wide taotie mask band extending between two bands of upright flower petals that also appear on the tall cover while opposing chilong crawl around the curving shoulder; the off-white matrix displaying a subdued polish, abundant icy white veins and some natural fissure lines. 8 1/2in (24.5cm) high. Estimate: $40,000 - 60,000

A fine white jade peach, pomegranate and citron group. 18th Century

Each auspicious fruit growing from a common leafy stem while a miniature bat stretches across one fruit in a russet-marked patch on the otherwise uniformly colored matrix of very faint celadon cast polished to a soft luster.. 3 1/4in (11cm) long. Estimate: $10,000 - 15,000

A good greenish white jade citron. 18th Century

Carved with its fingers rising upward from a stem entwined in lingzhi fungus, the surfaces carefully rounded, deeply undercut and subtly polished and the pale greenish-white matrix displaying an even hue with minimal white inclusions. 4 1/2 (11.5cm) high. Estimate: $6,000 - 8,000

A fine white jade group of a ram and two kids. 18th Century

The three auspicious animals depicted resting upon a rock and clouds while another cloud form emitted from the mother's mouth supports a yinyang roundel, some of the details deeply undercut and the surfaces polished to a bright luster, the matrix displaying an even hue with a faint celadon cast.. 3in (7.5cm) long. Estimate: $6,000 - 8,000

Bonhams. Fine Asian Works of Art, 29 Jun 2009. 220 San Bruno Avenue, San Francisco www.bonhams.com