Because Dune‘s spice is only found on Arrakis, it is considered one of the rarest commodities in the universe. It is a symbol of wealth and status outside of Arrakis and has highly addictive ...

In Dune Book III - The Prophet ... Hawat adds that the conditions on the prison planet are inhumane, and that it is a symbol of torture. He says that the Baron needs to give thought to Salusa ...