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Visible traces of copper, is this normal?
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<p>[QUOTE="Insider, post: 2618533, member: 24314"]I cannot enter into the discussion on the authenticity of this coin but I will about the bright color.</p><p><br /></p><p>The coin started out new at one time. Over the years it darkened to brown. Then the green patina formed as it is today. Generally, a bump on the rim would remain green. A very light file mark would remove the green. A little more would reveal the brown. Finally, a brutal filling would break thru the dark brown crust and the layers that were also affected by oxidation (still not bright) until the native alloy was abraded to a bright original color. Sometimes you need to go deep into the coin to reach that color. </p><p><br /></p><p>I have not destroyed a coin with BD yet to see if there is any bright metal in the coin's interior. Perhaps a member can take a $2 ancient Roman coin and try it. </p><p><br /></p><p>Additionally, if a bright, fresh color is evident on the metal when a flake of patina drops off...Beware. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie2" alt=";)" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>
[QUOTE="Insider, post: 2618533, member: 24314"]I cannot enter into the discussion on the authenticity of this coin but I will about the bright color. The coin started out new at one time. Over the years it darkened to brown. Then the green patina formed as it is today. Generally, a bump on the rim would remain green. A very light file mark would remove the green. A little more would reveal the brown. Finally, a brutal filling would break thru the dark brown crust and the layers that were also affected by oxidation (still not bright) until the native alloy was abraded to a bright original color. Sometimes you need to go deep into the coin to reach that color. I have not destroyed a coin with BD yet to see if there is any bright metal in the coin's interior. Perhaps a member can take a $2 ancient Roman coin and try it. Additionally, if a bright, fresh color is evident on the metal when a flake of patina drops off...Beware. ;)[/QUOTE]
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Visible traces of copper, is this normal?
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