BOULDER OPAL SNAIL PIN: This unique Australian boulder opal doublet is creatively crafted as a snail in motion, accented by diamonds in the 14k white gold body, finished with a locking pinback for a brooch, approx 1 3/8''l. Please note internal fractures to opal. A Boulder Opal doublet consists of a layer of opal permanently bonded to a layer of the host rock of ironstone. Retail $1267.00. Est. $400/600**