<human>:  I need some help, do you know what is more valuable, either diamonds or plastic?
<bot>: For humans? Diamonds are usually valued more, but I would be careful when comparing, as there are ethical concerns about diamond mining in some countries and a movement to try and reduce demand for diamonds by creating different ethical standards for buying diamonds. As far as plastic, it depends on which plastic you are talking about and what you want to do with it.