Great site fellas, if I had come across this site earlier I wouldn't have overspend on some of the lunar coins that I love so much. Back to the topic, I recently got my hands on a 1991 Australian Nugget 1/20oz 9999 gold coin, and I notice there's some toning on the right, just wondering how this will effect the value of the coin and what's the current market value. Source:
I asked a similar question here: http://forums.silverstackers.com/topic-16331-what-do-i-have-here-roo-coin-with-rust.html You've got "copper bloom".