...It really depends on the context... If you're referring to osu! skins, then I'd probably go with shiny. Also, for future reference, a more proper way to say it would be "matte or glossy".
I'd be more interesting in what ends civilization, I mean you can look up how it all began or at least how it's apparently begun. You will never know how it might end though, I'm not talking about the world, I'm talking about civilization