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Message:: [QUOTE="George Chaney, post: 4454576, member: 19137"]I've seen the style before on a marked ring, I just can't remember for the life of me who it was that made it and what it dated to. If I recall there was a patent on this design circa at the earliest 1930 to 1940's IMHO, stone is probably amethyst which is a 7 on the mohs hardness scale, so if it was worn often by your father, chipping would not be unexpected and just shows how much he enjoyed the ring. If the diamond is real, the amethyst will be. That said, the color of blue in the second picture indicates it could be a color change sapphire (that would suggest about a 99.9% likelihood synthetic). The stone will change color alternating between the purple and blue based on the type of light source. You can test this yourself by exposing the stone to different light sources and seeing how that affects the color of the stone. It would have to be examined by a gemologist to conclusively determine what the stone is. The ring saying Honor suggests it commemorates some event possibly related to military or education. I will guess, without holding it or examining the ring in person it would most likely be 10K yellow gold (speaking from the good old US...so if European, low carat gold such as a 9ct) but I think it is an American piece. It is not uncommon for karat stamping to get cut out of a ring that was sized down.[/QUOTE]