Hi, I shared this somewhere else on the forum, but I from what I was offered one (“lighter”) was catching the silver shimmer at a particular angle, and another (“darker”) wasn’t - it just stayed pretty much dark. I use term lighter and darker loosely here, as in most angles both looked pretty similar (dark). Please see pics to illustrate. I picked a “lighter” one for the glimpse of the silver shimmer that I found more interesting, but honestly it can only be seen at a particular angle/ in a certain light and when worn it doesn’t really look like this. Hope this helps!