searching for a wedding ring

hey everyone ive been looking at wedding rings lately abd i see they are VERY expensive but ive been looking at tinnivi, zales, Kay, and other websites that sell wedding rings but its mostly engagement rings.. have anyone kept their engagement ring and added a band or found a wedding ring and added a band to it....

I noticed zales and tinnivi sell sterling silver or white or plated silver or gold and they have amazing styles that I love but I don't think their real do you have a real wedding ring? is sterling silver good? I really want those nice big diamond rings but their almost like pass 3k and I see tinnivi have those type of styles I like but it isn't real.. would the color come off?

I honestly don't want to end up buying a ring that the color washes off..