Vintage Burt Cassell 12K Gold Filled Hand Carved Shell Cameo of a Rose Ring

c1950 By Burt Cassell 12k gold filled ring featuring an oval hand carved shell rose. The rose is finely carved. Approx. 5/8 x 3/8" set in saw tooth bezel. It has an adjustable shank -I took it up to about a 6.5 sz but it can go slightly larger or smaller. In very good vintage condition -typical wear for a piece 70 years old.