CZ means cubic zirconia, a type of glass synthetic stone. You have a Sterling silver ring with either Diamonique brand or diamond quality cubic zirconia. Although it’s not a real diamond and not worth thousands, it certainly has the potential to be a beautiful piece of jewelry.
★★★★★ Review: Sterling Silver Round Cubic Zirconia Stud Earrings Amazon Collection Jewelry
On Amazon here: https://amzn.to/2uSNHf6 ✏️ Quick thoughts to supplement my video demonstration. – Not too big and distracting …