More minerals for mining and trading!

as an example, minerals like silver and copper. Booth had an important role untill today in the human history and trade. These were new cool features in the game for production and trade in the game (Silver Crockery).
But also gems, gemstones, rubins, jewels to producing jewellery for your inhabitants and for trading withe the merchants would be awesome.

I`am really looking forward to see something like this in the game.