Message:

<p>[QUOTE=&quot;Lehigh96, post: 447222, member: 15309&quot;]Joe,</p><p><br /></p><p>A coin that is slabbed has no direct toning source.&nbsp; If the coin is stored improperly in an atmosphere rich in hydrogen sulfide gas, then yes the slabbed coin could develop toning.&nbsp; The toning would probably be yellow or gold in color and would probably be evenly distributed across the coins surface.&nbsp; There are many sources of hydrogen sulfide gas.&nbsp; For more information about how coins tone and the effect of hydrogen sulfide gas on slabbed coins, I suggest that you read Weimar White&#039;s &quot;COIN CHEMISTRY&quot;</p><p><br /></p><p>There is a section specifically dedicated to this topic.&nbsp; FWIW, the author leans very much towards Ruben&#039;s view of toning and even discusses how to remove the damage (toning) using dips.&nbsp; I found the information in the book useful, but I do not think that his opinion is consistent with that of the entire numismatic community.[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in