This ring is a size 5 3/4 (USA). Markings: Not marked (Tested & guaranteed to be Sterling Silver) This ring weighs 4.3 Grams The Stone/Design is Blue Turquoise Cluster – Natural, industry-standard treatment if any The Stone/Design measures 10.1 x 5.6 mm (center stone) The condition of this ring is Estate, Very good, the band is a little misshapen, light patina This vintage item is circa 1970 Thank you for viewing my item! Favorite the store to get updates when items go on sale!