Everyone I know dislikes Marie's ring but I honestly don't think it's that
bad. The idea of a ruby, a sapphire and a diamond to represent the tricolor of the bride's native France is lovely imo.
As for Claire, I find her ring rather masculine looking. And it doesn't help that she doesn't have very ladylike hands and could really have benefited from a good manicure in that photo.
I suppose I expected Felix to give Claire an engagement ring at least as spectacular as the one big brother Guillaume chose for Stephanie...but maybe Claire selected her own ring.