Centering (1) carved oval onyx cameo, measuring approximately 40 X 34 mm, depicting the profile of a woman, framed in black onyx and mother-of-pearl segments, accented by (2) full-cut diamonds, set in an 18k yellow gold mounting, marked K18, 0.02, measuring approximately 50 X 44 mm, completed by a fold up bail, pinstem and catch, suspended from a 2.7 mm, round linked, 18k yellow gold, 23 inch chain, gross weight 28.78 grams