a ring

A friend has a brand new engagement ring. She is already married but her husband promised he will buy her another ring which he did recently. It is a very nice diamond ring and I am happy for her. I am a little jealous too because I want another ring although I do not want another engagement ring, I just want a regular ring although I will be happy if it will be another diamond ring. Especially black diamond. Who would not want to own a Black Diamond Jewelry? The husband has said yes to another ring, in fact he told me to buy one but I am still thinking about what to get. It seems like every ring I like is expensive and I don't want to waste that much money right now. Perhaps in the future.