Thread:Qwertyxp2000 the second/@comment-26863688-20161020173043/@comment-25404524-20161020193715

We can see that the upgrades of the Jeweler are at random, but what we can see is the consistant increase in demand in more expensive crystals and/or a larger number of crystals.

Maybe we can change the notes of every structure article to show "coins between 100 and 2500" and "a random amount of crystals, raw or refined (polished or carved), and the amount required and the number of more expensive crystals likely demanded the higher upgrade you go".