Lost ring

I lost an antique ring that was given to me by my parents. The ring has three large stones that look like rubies (they are actually garnets) with four small diamonds that separate the large stones (two small diamonds between each of the large stones). If you have any information about the ring that will help me find it, or you have found it yourself, I'll offer a generous reward. The ring has huge sentimental value to me and I'm devastated that it's gone. The ring was lost approximately 3 weeks ago. I've been to the guards, and posted on here previously, but am doing this as a last attempt. Any help will be greatly appreciated.