Can you take it with you to a Staples or a Walmart or whatever store you have in your area that sells magnifying glasses and see what the markings say?
I'm really busy for the time being juggling school and getting stuff ready for prom and all my stuff I need to take care of at home. I don't have the time to, and even if I could catch a break for a few minutes, I would just like to relax. I can add a picture of what it says but that's al I can do for you.
I posted a picture, it looks kinda like it says "RL" but I can't be sure. I don't know much about jewellery, so even if it does say that, I have no idea what it means. The picture is pretty bad quality but all I have to take pictures with is my iPhone.