Gosan or Gossan: How To spell?
The word Gosan is misspelled against Gossan, a noun meaning "Decomposed rock, usually reddish or ferruginous (owing to oxidized pyrites), forming the upper part of a metallic vein."
Gossan has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings go & an which should not be misspelled with single 'S'
Wrong Spelling:  go-s-an  Correct Spelling:  go-ss-an 
Find more incorrect spellings of Gossan to spell right way.