14k gold emerald ring, heirloom

I lost my 14k yellow gold emerald ring yesterday around 3pm near Winchester Cathedral on College Street. It's a slim, size 7 ring with a single, vivid emerald set in a tiny bezel and a faint scratch along the band. Inside the ring there's a tiny engraving 'AK'—my grandmother's initials—and the band shows a little wear, but the emerald is still bright. This ring is a family heirloom that means a lot to me, and I'd really like to have it back.