Also they're kinda.. boring? Like visually appealing diamonds have become so commoditized you can buy them at grocery stores. Like it's not even a status symbol anymore in any sense of the word. You're the only person who will know if you have some super rare expensive diamond, we could play the game of "Is it Jared or Neil Lane?" most people won't do much better than flipping a coin.

Assuming a ring is important to you the only things you really need is a metal that's sufficiently soft so it'll be comfortable to wear 24/7, won't rust, and (optionally) some stones you think look cool. My engagement ring is alexandrite and moonstone because I thought the color changing was cool. The reaction I get from people who see it is this weird combination of "wow that's so pretty" and "for some reason I don't think I'm allowed to do that for myself."