For someone who is opposed to getting diamonds, what alternatives exist? Every time I think of this, this plays out in my head: "Sorry sweetie, I love you but

For someone who is opposed to getting diamonds, what alternatives exist? Every time I think of this, this plays out in my head: "Sorry sweetie, I love you but hate diamonds more. I'm not going to buy you a sweet ring to show off to all your friends. Will you marry me anyway?"