This vintage 14K yellow gold ring has a main stone of black onyx that is accented with the initial N and a diamond set in white gold. The sides of this size 11 signet ring are ribbed and the diamond is approximately 2.4 millimeters and the it weighs 3.6 grams. The inner band is hallmarked 14K and there is an additional mark in an oval that I can't read and the date 4. 1. 1978. This ring is in wonderful vintage condition with no issues to report. The classic style and striking sophistication of this ring will suit a man or woman.