Silver-tone necklace with crescent moon pendant

I lost my silver-tone necklace yesterday around 3pm after leaving a cafe near the PPL Center in Allentown. It’s a slim 18-inch chain with a dainty crescent moon pendant, about 1 cm tall, and a tiny red ruby accent on the moon. The chain shows a slight tarnish and there’s a small scratch near the clasp from daily wear. I think I dropped it while juggling a bag on Hamilton Street, near the Starbucks. It’s really special to me—it was a gift from my sister and has sentimental value; I really need it back.