A silver mounted hardstone candlestick  by Carl Fabergé, Workmaster: Johann Victor Aarne, St. Petersburg, 1896 -1908. Photo courtesy Wartsky

the body of the candlestick formed from a Chinese jade Archer's ring, held in a circular beaded silver mount sat on three gadrooned bun feet. Diameter of mount 4.1cm. Price on application

An archer's ring was originally a device especially designed to protect the archer's thumb when shooting an arrow. They evolved into ornaments and were especially popular in the Qing Dynasty. 
During which they were worn as a symbol of rank.

Fabergé was fascinated by Oriental works of art and mounted a number of Chinese jade items in his work. 
He also mounted a Chinese jade cricket cage in enamelled gold, see Fabergé, the Kunsthalle of the Hypo-Kulturstiftung, Munich, 1986-1987, number 389.

Wartsky. http://www.wartski.com/