A ring marked with 15 is usually 625% gold content and are stamped from old Britain. These rings are very rare and usually start at a value of 15,000gp and go up as high as 500,000gp. Most of these that are left are found in Canada for some unknown reason. If you find one guard it with your life and get it appraised as soon as possible. Lucky find
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Oh My America - Stones Too Sparkly to Photograph by: Yvonne
Good Morning
Emma, if smooched in diamonds ring, is too sparkly to photograph, oh my america, you do have a problem, wearing this ring on your finger, could give the impression, one has money to burn, which isn't always so desirable.
These are UK hallmarks, the maker will be CHARLES LYSTER & SON (Birmingham, UK) - ca 1890s - 1920s.
The stone in the center which you've described as a "gold diamond" sounds fascinating, to say the least. There are a few possibilities, a colored diamond, topaz, citrine, but you will never know for sure Emma until you get the stones tested.
