This ring is a size 5 1/2 (USA) Markings: Not marked (Tested & guaranteed to be Sterling Silver) This ring weighs 4.5 Grams The Stone/Design is Blue, Green Turquoise Cluster, Zuni Natural, no treatment The Stone/Design measures 5.4 x 2.7 mm The Ring face measures 37.8 x 17.6 mm The condition of this ring is Estate, Good, lots of patina, looks very old This vintage item is circa 1950 Stock# R4562Aly Thank you for viewing my item! Favorite the store to get updates when items go on sale!