<human>: Condense the text into a few key points

So this actually happened last night... I work at national chain jewelry store and have sold jewelry for 8 years and yesterday was the first time I've been stolen from. Last night I had a lady come in to my store right before closing and ask to look at some pieces. Because it was late and let's be honest she looked a bit like a street walker I kept telling her I could only have  a couple pieces out at a time and she kept trying to get me pull put more. I kept my professional face on and told her as it was after closing I couldn't. She had a ring on her finger and wanted to look at diamond studs. As I walk her to the case I tell her to look at the studs I need the ring back. She says she gave it back to me. I flat out tell her she didn't and she says she handed it to me. I walk back to the first case and very pointedly tell her no she didn't. She claims to have left it on the case. So now I'm freaking out because the ring is no where. I look in the case, on the floor. She then empties her purse so I can see it didn't fall in and shows me the pockets of her hoodie. No ring anywhere. Seeing as how I can't exactly frisk her down she walks out of my store with a $130 ring and hopefully I don't get fired tomorrow.
<bot>: Lady comes in to my store right before closing, tries on rings, as I'm walking her to another case she makes a ring disappear and hopefully I don't lose my job over it.