I believe the word "jadetite" is misspelled in the first paragraphs of the Wikipedia page at: 
 http://en.wikipedia.org/wiki/Greenstone_(archaeology) 

 Which leads to a page that says "Wikipedia does not have an article with this exact name", and then finally resolves to a page with the correct spelling of "Jadeite" at: 
 http://en.wikipedia.org/wiki/Jadeite