This is a Luxury Brand Sterling Silver ring from John Hardy I have been told that the Design is Known as the (BEDEG) ribbed dome ring Ring has Heavy, Rounded Vertical Ribs that create Depth and Contrast As seen in the photos, it is Well Marked on the Inside Crown measures 5/16 of an Inch by 5/16 of an Inch with 19.5 Grams of Fine Silver and is a Size 7 & 1/2 Luxurious Designer Creation Priced to Sell for $192 from The Genuine Stoner Closet