A Yellow Jade Archaistic Scabbard Slide, Zhi Qing Dynasty, 18th / 19th Century

of characteristic form with a rectangular top and incurved ends resting on a rectangular lug, carved with a taotie mask below a pattern of 'C'-scrolls and 'comma'-scrolls enclosing two cross-hatched lozenges, the translucent stone of a yellowish-green colour with faint russet inclusions on the underside