Gold Plated Original Natural Blue Topaz Swiss London Stone Sterling Silver Ring Real Untreated Blue Topaz London Swiss Stone Ring Genuine Topaz Stone Ring For Mens. Total Carat: 5 Carat. Total Weight Silver: 20 grams. Ring Sizes: All US, UK & International Size Available (5US, 6US, 7US, 8US, 9US, 10US, 11US, 12US, 13US, 14US, 15US, 16US). Type: Natural Unheated Untreated Gemstone. Note: Stone Color as seen on the Store. We take the photos mostly in a Natural Daylight & Night Light condition and that combined with the screen you are viewing the item may vary a little in different lighting conditions and different lighting angles as all-natural stones exhibit different color variations.