Gold-tone pendant necklace with emerald charm

I found a gold-tone pendant necklace this afternoon around 3:15 pm near Bayside Marketplace along Biscayne Boulevard in Downtown Miami. It sits on an 18-inch gold-tone chain, and the pendant is a small emerald-cut stone with a simple halo setting. The chain has light wear and a tiny scratch on the back of the pendant from a drop or two. There’s no noticeable brand on the piece, and the overall look is casual, everyday. If you think it’s yours, tell me about the exact length, pendant shape, and any engraving on the clasp or scratches so we can verify and arrange a meetup near the Bayside entrance.