Vintage 14K Yellow Gold Carved Shell Cameo with Pink Tourmaline Halo Ring

c1990 14K yellow gold ring featuring a hand carved shell cameo of a lady in profile signed by artist on back, surrounded by round cut pink tourmalines. Cameo is finely carved. Front is 7/8" length x 3/4" wide. Ring size 8.5 and weighs 6.9 grams. Very good preowned condition.