1950's CROWN TRIFARI Pat Pend Green Rhinestone Gold Tone Snake Chain Necklace. Elegant Emerald Green Colored Glass Rhinestone Accents!!! The swirling design is finished with a gorgeous Snake Chain. It hooks in the back with a Fold Over Clasp Closure It measures approximately 15 1/4 inches closed. It is just under 1 3/4 inches wide at the front. Signed on the back of the front piece Trifari with the Crown, and Pat Pend.