Someone Found My Lost Engagement Ring And Then Ghosted Me After I Provided Proof Of Ownership. Help!

I lost my ring a month ago while walking home from work, it’s an alexandrite with a diamond halo. My friend stumbled upon a TikTok video of someone in our city who had found it, so I contacted them. They kept saying how they developed a sentimental connection to the ring and how it came to them on a “very unique night and felt like it was a gift from the universe”. She said if I could provide additional details that could prove ownership, she’d give it back to me. I was able to confirm that the ring belonged to me, but then she ghosted me. How can I proceed with this? I have her face from her TikTok but she’s using a stage name on the account (she seems to be a stripper/burlesque dancer from her videos). I don’t know what I can do. Help!