We made this cufflink using copper just for the sake of variety yet we didn’t foresee how good this item would turn out to be in terms of sales and customer feedback. Copper is the most common item you get to see on a daily basis, as a matter of fact the pennies that you keep in your old piggybank is made out of this type metal, although not in pure form. But this cufflink here is a different story. It is made out of pure copper cast into a mold to take the shape of the 3/4” square mount for the hematite centerpiece you now see. As is customary at Cuff-Daddy, we have included a lifetime warranty slip with every purchase of this item for your satisfaction.