An emerald and eighteen karat gold Chi Rho brooch, Castellani, circa 1860. Photo Freemans

centering a carved emerald measuring approximately 16.00 x 14.00mm, depicting the face of Jesus, accented by sugarloaf and heart-shaped emeralds, with rope borders; maker's mark for Castellani. L: 2 1/2 in., 19.7 dwt. Estimate $15,000-25,000 

Freemans. JEWELRY & WATCHES. Monday, May 5 at 12 noon - http://www.freemansauction.com/