There really is not a good reference site for this. Use of the term is scattered throughout the various coin sites, auction archives and books. Generally, it is a term used to describe rainbow toned
Morgan dollars - pull-away toning is a powerful tool to determine the authenticity of genuine rainbow toned
Morgan dollars versus those that were artificially toned. Since copper and bronze tone to a lustrous brown, at a much faster rate than silver, you rarely see it on older 1-cent coins. But, leave a shiny new penny outside for a few days, with rain and sunshine, and you can repeat what you see in the original post - tilt the coin slightly at different angles, and the toning pulls in any direction you want...
"Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See:
http://creativecommons.org/licenses...0/deed.en_USMy
eBay store