Just stumbled across this and thought I'd add my two cents (love the ring by the way! simple but still very unique and elegant). To return to the issue of the ring metal, I noticed a few posters said white gold is just yellow gold plated to look white but that's not completely accurate. White gold is yellow gold alloyed with a white metal such as nickel (which some are allergic to, btw, so be warned!) to make it look white. THEN it's dipped in rhodium to give it it's shiny white appearance. The metal that shows through after the plating wears off is more of a yellow-tinted white, but you'll still need to get it re-plated to get it looking shiny white again. One of the benefits of platinum is that it is naturally white and doesn't lose it's color. It will start to take on a grayish satin finish over time, but you don't need to get it plated...you can just polish it to restore its original luster. Also, platinum is hypoallergenic, so you don't need to worry about it causing any reactions. There are actually quite a few practical reasons to go with platinum, but you should decide for yourself whether it is worth the extra expense. In the end this should be you and your DF's decision, and no one else's. Hope some of that helps and congratulations!