Timed out 11 votes to 0. Enacted by Kevan.
Adminned at 10 Mar 2010 05:06:30 UTC
Add a sub-rule to rule 2.2, entitled Hyper-Pressuriser:
Cost: 3 Iron, 1 Quicksilver, 1 Caffeine Power Requirement: 20
A Commoner who owns an invention which includes a Hyper-Pressuriser can, at any time, spend 100 Coal to gain 1 Gem.
If I calculated correctly, the free market would say “175 Coal are more or less equal to one Gem.” Last week the value of gems was even higher… (and yes, next week it might become lower again)
So it’s seem ok. 
PS: Note, that I am not a friend of Free Markets in real life. I just thought of my (going to fail) Proposal…
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Kevan: he/him