How about refining luxury raw materials.
Gold or Silver or any other item could be refined to Religions idol or jewelry or Art or Science experiment or (military weapon ?) Each will give faith, trade, culture, science ens ens to you civ.
Maybe you could have a building than does the refining.
This will add more complexity to the game. Either you can focus on one faith, trade, culture, science, military.. or diversify.
Gold or Silver or any other item could be refined to Religions idol or jewelry or Art or Science experiment or (military weapon ?) Each will give faith, trade, culture, science ens ens to you civ.
Maybe you could have a building than does the refining.
This will add more complexity to the game. Either you can focus on one faith, trade, culture, science, military.. or diversify.