imagine cities have museums to show them
gems for jewlery?
We have a gemology skill on OPR that is a start to this idea. But being able to upgrade tools with a mechanic would allow for increased durability or swing spped or faster shoes...enhancements to an existing item that would increase the maximum durability greater than 100%
Its the one thing missing I think would be easy. Gemstones would be ideal for adorning high decor items. Just make them rare to find. Diamonds, Rubies, Emeralds, Sapphire etc. I saw they are adding dinosaur bones that would be really cool! Maybe some rare earth like lithium /cobalt which requires a LOT of energy to clean or it pollutes extremely fast.
Agreed, it would also add some diversity between games, since you could have different rare items depending on the world, and having luck finding one in the beginning could push a player to try a new gameplay exploiting or promoting the rare resource he has settled on.
It would be fun to find gems or fossils while mining :)