Fashioned in 925 Sterling Silver, this fancy men's wedding band ring feature Simulated Diamond Cubic Zirconia (CZ) accents stretching across the center of the band with high polished band. We use high quality Cubic Zirconia Simulated Diamonds in our jewelry. Cubic Zirconia, or CZ, is a stone so optically close to diamond that most jewelers cannot tell the difference between a CZ and a diamond with the naked eye. It resembles the same optical characteristics, radiance and beauty as diamonds. CZ is much less expensive than diamond, optically flawless, and can be created in a variety of different colors. The biggest difference is that CZ is 70% heavier than diamond. CZ is extremely durable with a hardness rating of 8.