The diamonds we use on our tungsten rings are Brighter, shinier, Larger, cleaner inside, and are Generally Better Quality than of most our competitions. Our Tungsten Rings are Cobalt Free to avoid allergies and have the Carbides to make them Scratch Resistant and the quality is Excellent. And we carry in stock more sizes including half sizes and we deliver them faster than just about any store online or otherwise. Word of CAUTION; it seems that most materials become brittle as they become harder, so do please avoid dropping tungsten rings on hard surfaces. Porcelain tiles in particular are powerful tungsten breakers.