I found this ring years ago. It has a number of unusual marks on it. One I think is probably indicating 18 carat although it is not standard format. https://picasaweb.google.com/lh/photo/xAN_My2x2j-SS92IadDJrA?feat=directlink The cones or wedges, the number fours https://picasaweb.google.com/lh/phot...