Please help me find a silver locket lost in Ciudad de México

I'm Paloma. I lost my late wife's silver locket on Tuesday, somewhere between the station and the bus stop. It's a small silver locket with a photograph inside. It isn't valuable to anyone else, but it's one of the last things I've of wife. I've retraced my steps twice and asked at the shops and the bus company. If you've found it, or you have a bin, a bench or a hedge you could check, I'd be grateful. A finder's thank-you is waiting. Please use the offer button here rather than sharing any numbers publicly. Every share helps. Thank you.