1/2 Carat Diamond Ring *Cheaper Mercari*

I don't know a whole lot about this ring, except that it's 1/2 a carat & was purchased from JCPenney. *it's 100% real. The band is silver (925 shown in pic) and says 'Jweir' on the underside (opposite from the 925) *I was told it's a size 6.5 (i never had it resized & the jeweler told me that most rings come originally as a 6.5) Also, my weddings ring also came as a 6.5 but I had to have them sized smaller, and when trying this ring on, it fit loosely, as my wedding rings originally did. *feel f