Gold ring with initials and ruby

I was in the Mattoon-Charleston area yesterday around 3pm and I must have dropped this ring somewhere near the Mattoon Town Square, probably by the Bank on 6th Street. It's a gold ring, about a size 6, with a small ruby and a subtle brushed finish. The inner band is engraved with 'M.K.' and there's a tiny scratch along the outside edge—easy to identify. It means the world to me because it was a gift from my grandmother, and I’m really hoping to get it back.