A silver mounted hardstone photograph  by Carl Fabergé, Chief Workmaster: Henrik Wigström, St. Petersburg, 1908-1917, with English import marks for 1914. Photo courtesy Wartsky

a single piece of nephrite cut in circular form, centred by a circular aperture beneath domed glass held in a chased silver bezel, with silver back, supported on a scrolled silver strut. 10.2cm, 4 mm depth to panel. Price on application

Wartsky. http://www.wartski.com/