User blog comment:LuluChoy/Usage of jewels for free users/@comment-25067771-20140716192017

The 3rd workshop is 500 jewels, and the 4th one is 1k. There's a lot of value in obtaining a 3rd workshop very early on. The longer you play, the more value you get out of it. By buying the 3rd workshop you increase your kingdom productivity by 50%. And when the upgrades can take days the value of a workshop grows at an exponential rate. Eventually it'll save you weeks and possibly months worth of time.

I would recommend the 3rd workshop as the very first jewel buy.

I agree with the rest of your post though. Especially card limit+. I feel like it's underrated and the utility of a couple of these goes a long way. Well written post!