2.5ct. Natural Blue Topaz Solid Sterling Silver Ring100 Year Design#D37z (smaller version) This is an Edwardian reproduction filigree ring in antiqued solid sterling silver. The round full cut high quality 2.5ct Natural Blue Topaz solitaire gemstone is 9mm in diameter and 5mm depth. The inside of the band is marked 925 for sterling silver. Notice the beautiful intricate crown-like design of the silver filigree setting and the etched band. The original ring in this exact design was circa 1910.  A beautiful solitaire to show that ONE person how much they are loved.  This makes a perfect promise, engagement or wedding ring.