This finely carved jade powder horn, or priming flask, delicately uses the two natural tones of the jade to enhance its design. The tapering, darker end features the head of an ibex, recognizable by its two long twisted horns, from whose mouth the powder would pour. It is being attacked by a leaping leopard activated by a lever to open and close. Derived from similar models made of natural horn or ivory, jade examples are rarer. Comparables are in the National Palace Museum of Taipei, lieh 359.34 and kuyu 2743 (Taipei 1983, nos. 69 and 70), the Louvre Museum, Paris (inv.nos. R437 and R436), the Victoria and Albert Museum, London (inv. no. 02585(IS)), as well as the Al Thani collection (Jaffer 2013, no .26, p.100).