Antique Sterling Silver Ring

Antique sterling silver ring. A beautiful ring with a stone that capsules the light. I found this ring at an antique store the lady told me that was a moonstone. I never have taken it to a jewelry store to confirm the stone but it is beautiful when the light reflects it and it gives different colors. The ring has the hallmark 9.25 and it is a size 5. It also has a hallmark ArJo as well.