Stunning Vintage Ring With A Very Large Emerald Cut Blue Crystal Stone That Reminds By Color Of A Good Aquamarine. The Blue Crystal Stone Is Approx. 16x12 Mm In Size ( Do Not Have A Carat Weight ). The Wide Band Is Approx. 14mm Wide Up Front And Tapers Down To Approx. 6.5 Mm Wide In The Back Of The Ring. There Are Several Sort Of Marks Inside The Band That Look Like A Remnants Of A Hallmark, But I Did Not Find A Full Sterling Stamp, However The Ring Has Been Tested And Guaranteed Sterling Silver. Due To The Wideness Of The Band, The Ring Sits On Mandrel Between Sizes 5.5-6.5 . All Pictures Are Part Of The Description . Absolutely Gorgeous Artisan Made Vintage Ring , Very Unique !!!