CleveraptorYou must choose from a gemstone or metal, just at large, that you prefer, @KimHanuel. Which is it? Why is it? What else on the matter can you lend?
Call me old fashioned, I suppose, but I'd go with a gemstone. Sure, they can break somewhat easily, but I enjoy the mirage of colors they provide. Metal is cold and sturdy, which is good, but it lacks...color? Not to say that metal isn't unique in its own way, it very much is, but gemstones fascinate me. A tint rock that can hold that much beauty, that much color, makes me happy.