I don't really care much about typos. Hell, this post probably has several of them. And I hate pointing them out. But this is the thread for being that guy.
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Here goes:
There is a double Quotation Mark at the begining of the quote in Iron Amalgamation.
Tasteful Gemcutting has B.C.E instead of BC. Not a big deal, I personally like BCE better, but it seems to be the only Skill with it, so I thought I'd point it out.
Mineral Sifting, has parentheses around date, again not a big deal, but is the only Skill I've seen like that. Also within the explaination text the skill refers to itself as "Gem Sifting" rather than Mineral Sifting.